IN THE UNITED STATES DISTRICT COURT

FOR THE SOUTHERN DISTRICT OF ALABAMA

SOUTHERN DIVISION

TYRA KIRKSEY, )

)

Plaintiff, )

)

v. ) CIVIL ACTION 15-0115-WS-N

 )

SCHINDLER ELEVATOR )

CORPORATION, et al., )

)

Defendants. )

ORDER

This matter comes before the Court on Defendants’ Joint Motion to Exclude Proffered 

Opinion Testimony of J. Barton Weeks, David Cooper, and Traci Campbell (doc. 89), as well as 

Defendants’ Joint Motion to Exclude Joseph Stabler (doc. 92). Both Motions have been 

exhaustively briefed and are now ripe for disposition.1

I. Background.

This wrongful death action arises from an incident at the Sears retail store at Bel Air Mall 

in Mobile, Alabama, on June 14, 2014. An 11-year old boy named Jakobe Kirksey fell more 

than 20 feet to his death over the side of a moving escalator handrail on the second floor of the 

 1 The Court takes the Motions under submission without a hearing. The decision of 

whether to conduct a Daubert hearing is discretionary. See, e.g., Corwin v. Walt Disney Co., 475 

F.3d 1239, 1252 n.10 (11th Cir. 2007) (in Daubert context, “although they are often helpful, 

hearings are not prerequisite to such determinations under the Federal Rules or established law”); 

United States v. Rodriguez, 591 Fed.Appx. 897, 899 (11th Cir. Jan. 21, 2015) (“it is clear that a 

district court need not conduct a Daubert hearing where one would be unnecessary”); Madura v. 

BAC Home Loans Servicing, LP, 593 Fed.Appx. 834, 847 (11th Cir. Nov. 10, 2014) (“Although 

Daubert hearings ‘are often helpful,’ they are not a prerequisite to determine the admissibility of 

expert testimony under the Federal Rules of Evidence or established law.”) (citation omitted). 

Given the vast array of briefs and exhibits the parties have submitted in support of their 

respective positions on the admissibility of these witnesses’ testimony, a hearing would be 

neither necessary nor helpful to understanding the nature and bases of these witnesses’ opinions 

or the grounds for defendants’ objections. At any rate, no party has requested a Daubert hearing 

as to witnesses Weeks, Cooper, Campbell and Stabler.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 1 of 33
-2-

store. Jakobe’s mother, Tyra Kirksey, brought a wrongful death lawsuit against Sears, Roebuck 

& Co. (the owner/operator of the premises) and Schindler Elevator Corporation (the escalator 

manufacturer). Central to plaintiff’s claims is her contention that the spot where Jakobe fell was 

an unguarded floor opening that should have had a guardrail or some other form of fall

protection.

On that basis, plaintiff purports to assert a wrongful death claim against Schindler 

pursuant to Alabama Code § 6-5-391 on theories of “common law negligence, common law 

wantonness, and also product liability under the Alabama Extended Manufacturer Liability 

Doctrine (‘AEMLD’) related to the sale, design, manufacture, and installation of the subject 

escalator in 1997.” (Doc. 103, at 2.) Plaintiff also purports to assert a § 6-5-391 claim against 

Sears on the theory that “Sears is guilty of common law negligence and/or common law 

wantonness relating to the safety of its store.” (Id. at 3.) Defendants have raised affirmative 

defenses of contributory negligence, “open and obvious,” and product misuse. (Id. at 4-6.)2

At trial, plaintiff intends to offer the expert testimony of J. Barton Weeks, David Cooper,

Traci Campbell and Joseph Stabler pursuant to Rule 702 of the Federal Rules of Evidence. 

Defendants now seek to exclude all or part of each such witness’s testimony on the grounds that 

Weeks, Cooper and Campbell “do not possess the requisite qualifications to render their 

proffered opinions and they filed to use reliable methodology and [sic] formulating their 

opinions;” and that Stabler “is not qualified to render an opinion” and “failed to use reliable 

methodology.” (Doc. 89, at 1; doc. 92, at 1.) Both Motions to Exclude have been extensively 

briefed; indeed, the parties have collectively offered more than 110 pages of briefing and 

approximately 850 pages of exhibits in support of their respective positions as to these threshold 

admissibility questions.

II. Governing Legal Principles.

The Federal Rules of Evidence, as construed by the Supreme Court in the landmark case 

of Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579, 113 S.Ct. 2786, 125 L.Ed.2d 

 2 In the Joint Pretrial Document, defendants also identify their “Affirmative 

Defense that the Alabama Wrongful Death Act Violates United States Constitution.” (Doc. 103, 

at 5.) On summary judgment, however, the Court found that defendants’ constitutional objection 

fails as a matter of law. (See doc. 85, at 34-41.) As such, this “affirmative defense” is no longer 

part of the case and will not be presented to the jury at trial.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 2 of 33
-3-

469 (1993), “require[] expert scientific evidence to be both reliable and relevant pursuant to Rule 

702,” such that it “appropriately assists the trier of fact.” United States v. Henderson, 409 F.3d 

1293, 1302 (11th Cir. 2005). In that regard, “[t]he court serves as a gatekeeper, charged with 

screening out experts whose methods are untrustworthy or whose expertise is irrelevant to the 

issue at hand.” Corwin v. Walt Disney Co., 475 F.3d 1239, 1250 (11th Cir. 2007). This 

gatekeeping function is guided by the well-established principle that “[t]he proponent of the 

expert testimony carries a substantial burden under Rule 702” to show admissibility of that 

testimony by a preponderance of the evidence. Cook ex rel. Estate of Tessier v. Sheriff of 

Monroe County, Fla., 402 F.3d 1092, 1107 (11th Cir. 2005); see also Boca Raton Community 

Hosp., Inc. v. Tenet Health Care Corp., 582 F.3d 1227, 1232 (11th Cir. 2009) (“The offering 

party must show that the opinion meets the Daubert criteria, including reliable methodology and 

helpfulness to the factfinder ..., by a preponderance of the evidence.”).

As a general proposition, “[i]n determining the admissibility of expert testimony under 

Rule 702, a district court considers whether (1) the expert is qualified to testify competently 

regarding the matter he intends to address; (2) the methodology by which the expert reaches his 

conclusions is sufficiently reliable as determined by the sort of inquiry mandated in Daubert; and 

(3) the testimony assists the trier of fact, through the application of scientific, technical, or 

specialized expertise, to understand the evidence or to determine a fact in issue.” United States 

v. Douglas, 489 F.3d 1117, 1124-25 (11th Cir. 2007). “While there is inevitably some overlap 

among the basic requirements – qualification, reliability, and helpfulness – they remain distinct 

concepts and the courts must take care not to conflate them.” Rosenfeld v. Oceana Cruises, Inc., 

654 F.3d 1190, 1193 (11th Cir. 2011) (citation omitted).

In examining the reliability prong, Daubert teaches that the following factors should be 

considered: “(1) whether the expert’s methodology has been tested or is capable of being tested; 

(2) whether the theory or technique used by the expert has been subjected to peer review and 

publication; (3) whether there is a known or potential error rate of the methodology; and (4) 

whether the technique has been generally accepted in the relevant scientific community.” Tampa 

Bay Water v. HDR Engineering, Inc., 731 F.3d 1171, 1184 (11th Cir. 2013) (citations omitted). 

That said, “[t]he rules relating to Daubert issues are not precisely calibrated and must be applied 

in case-specific evidentiary circumstances that often defy generalization.” United States v. 

Brown, 415 F.3d 1257, 1266 (11th Cir. 2005). For that reason, courts have stressed that the 

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 3 of 33
-4-

Daubert inquiry is “a flexible one,” that the Daubert factors are mere guidelines for applying 

Rule 702, and that “expert testimony that does not meet all or most of the Daubert factors may 

sometimes be admissible” based on the particular circumstances involved. Id. at 1267-68. In 

performing a Daubert analysis, the court’s focus must be “solely on principles and methodology, 

not on the conclusions that they generate;” indeed, it matters not whether the proposed expert 

testimony is scientifically correct, as long as it is shown to be reliable. Allison v. McGhan 

Medical Corp., 184 F.3d 1300, 1312 (11th Cir. 1999). Even in the aftermath of Daubert, it 

remains true that “vigorous cross-examination, presentation of contrary evidence, and careful 

instruction on the burden of proof are the traditional and appropriate means of attacking shaky 

but admissible evidence.” Rosenfeld, 654 F.3d at 1193 (citations omitted). “[I]n most cases, 

objections to the inadequacies of a[n opinion] are more appropriately considered an objection 

going to the weight of the evidence rather than its admissibility.” Id. (citations omitted). Thus, 

disagreements as to the manner in which an expert performs modeling or analysis may best “be 

aired out in front of the jury and tested by the crucible of cross-examination,” without 

implicating the Daubert gatekeeping function. Tampa Bay Water, 731 F.3d at 1185. 

Importantly, “[o]nce an expert opinion has satisfied Daubert, a court may not exclude the 

opinion simply because it believes that the opinion is not – in its view – particularly strong or 

persuasive.” Seamon v. Remington Arms Co., 813 F.3d 983, 990 (11th Cir. 2016).

It bears noting that Daubert principles do not bar an expert’s opinion as unreliable merely 

because it is grounded in personal knowledge or experience. See, e.g., United States v. Jennings, 

599 F.3d 1241, 1248 (11th Cir. 2010) (“A district court may decide that non-scientific expert 

testimony is reliable based upon personal knowledge or experience.”) (citation omitted); Maiz v. 

Virani, 253 F.3d 641, 669 (11th Cir. 2001) (“there is no question that an expert may still properly 

base his testimony on professional study or personal experience”) (citation and internal quotation 

marks omitted). “The experiential nature of [an expert]’s expertise does not render his opinions 

per se unreliable, equate to lack of methodology, or warrant automatic exclusion of his 

testimony.” Continental Motors, Inc. v. Jewell Aircraft, Inc., 2013 WL 5530842, *7 (S.D. Ala. 

Oct. 4, 2013). That said, “[i]f the witness is relying solely or primarily on experience, then the 

witness must explain how that experience leads to the conclusion reached, why that experience is 

a sufficient basis for the opinion, and how that experience is reliably applied to the facts.” 

United States v. Augustin, 661 F.3d 1105, 1125 (11th Cir. 2011).

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 4 of 33
-5-

The foregoing principles inform the undersigned’s evaluation of defendants’ objections to 

the admissibility of opinions articulated by plaintiff’s proffered experts.

3

III. Challenge to Proposed Expert David A. Cooper.

A. Qualifications and Opinions.

The Joint Pretrial Document identifies one of plaintiff’s experts as David A. Cooper, a 

chartered engineer in the building services sector with 33 years of experience, including 20 at the 

senior management level. (Doc. 103, Exh. 4.) Cooper’s academic qualifications include a 

Bachelor’s degree in engineering, a Master’s degree in lift engineering and a Master’s degree in 

research. (Id.) He has published numerous works concerning escalators and elevators, including 

 3 A recurring theme in defendants’ objections to plaintiff’s experts is that, even if 

such testimony were admitted, plaintiff could not satisfy the legal elements of her claims under 

Alabama law. (See, e.g., doc. 90, at 5-6, 11, 13, 22; doc. 115, at 1-3, 6, 8, 10.) In particular, 

defendants argue that, under Alabama law, Kirksey cannot prevail unless she proves at trial that 

(i) there was a reasonable, safer, alternative design for the escalator that would have eliminated 

or reduced Jakobe’s injuries; and (ii) the utility of such alternative design outweighed the utility 

of the design actually used. Defendants lambaste plaintiff’s expert opinions as not meeting this 

standard. The trouble with this line of reasoning is that it is fundamentally a “sufficiency of 

proof” argument, which may have been well suited for a summary judgment motion but has no 

place in a Daubert motion. The Court declines to construe defendants’ Motions to Exclude as 

renewed summary judgment motions. After all, the deadline for filing Rule 56 motions in this 

case expired more than six months ago. (Doc. 31, ¶ 12.) Each defendant filed an elaborate 

summary judgment motion, and both motions were heavily litigated and (mostly) denied via a 

42-page Order (doc. 85) entered on June 7, 2016. If defendants had wished to argue that 

plaintiff’s expert opinions – in concert with the rest of plaintiff’s evidence – were insufficient as 

a matter of law to make out viable claims, then they could and should have done so then. Not 

now. A Daubert motion is not a backdoor means of achieving a second bite at the summary 

judgment apple. To be sure, defendants couch their arguments that plaintiff’s experts’ opinions 

fail to satisfy her burden of proof for her substantive claims under Alabama law in terms of the 

“helpfulness” prong of the Rule 702 analysis. It is true, of course, that one prerequisite for 

admissibility is that the proffered expert testimony “assists the trier of fact ... to understand the 

evidence or to determine a fact in issue.” Seamon, 813 F.3d at 988 (citation omitted). But the 

helpfulness prong “goes primarily to relevance” and applies the “basic standard of relevance,” 

which is “liberal.” Id. (citations omitted). Plaintiff’s experts’ opinions are plainly relevant to the 

issues joined here. It is not necessary that each expert’s opinion, taken in isolation and without 

regard for plaintiff’s other evidence, prove her case in its entirety in order to be admissible; 

rather, it suffices if the opinion is “relevant to the task at hand” and “logically advances a 

material aspect” of plaintiff’s case. Boca Raton Community Hosp., 582 F.3d at 1232 (citations 

omitted). The subject expert testimony in this case meets that modest threshold. Accordingly, 

this Court will not entertain summary judgment arguments disguised as Daubert objections at 

this time.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 5 of 33
-6-

co-authorship of a book entitled Elevator & Escalator Accident Investigation & Litigation. (Id.) 

Cooper has worked in the lift and escalator industry since 1980, including early-career 

experience working on escalators as a service engineer and (for more than 20 years) employment 

as a consultant. (Doc. 90, Exh. A at 2.) His dissertation for his Master’s degree in lift 

engineering was “an investigation into escalator accidents in retail environments,” and his thesis 

for his other advanced degree was “an investigation into falls from or over the sides of 

escalators.” (Id.) All told, Cooper has conducted more than 100 investigations into escalator 

accidents and has authored numerous papers about the subject. (Id.) Cooper has sat on the 

British Standards MHE/4 committee for lifts and escalators since 1990, and is an Associate 

Lecturer at the University of Northampton specializing in lift and escalator technology. (Id.) He

has presented his research on escalator falls at industry events around the world and has 

published that research in trade journals worldwide. (Id.) Finally, Cooper has substantial 

experience as an expert witness in cases involving escalators, including investigations into falls 

over the sides of escalators. (Id. at 45.)4

In the Joint Pretrial Document, plaintiff summarized the opinions that she expects Cooper 

to offer at trial as including the relevance of the subject escalator’s design to his research on 

escalator falls, “ways to design around issues causing falls, how these could and should have 

been incorporated in the escalator’s design, and the existence of such designs in the industry.” 

(Doc. 103, Exh. 4, at 5.) Plaintiff will also have Cooper “present information regarding his 

extensive research, and the industry knowledge, of the risks of falls from escalators.” (Id.) 

Leaving aside this rather nebulous description, Cooper’s report includes among his salient 

opinions the following: (i) “to a reasonable degree of certainty, the escalator presented a 

dangerous condition to patrons;” (ii) “design (i.e. the long drop to the side of the escalator) was 

the main contributory factor to this accident;” (iii) “the escalator presented a dangerous condition 

due to the layout of the incident escalator in an open atrium and due to a number of dimensions 

of the escalator;” (iv) the risk of injury was exacerbated “by the layout [inasmuch] as the height 

of the fall is increased by the architectural layout of the area;” (v) “low handrails are a factor in 

 4 Given these and other pertinent credentials outlined in Cooper’s CV, it might not 

be hyperbolic for plaintiff to posit that “[n]o one on earth knows more about falls from 

escalators” than Cooper does. (Doc. 107, at 16.)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 6 of 33
-7-

this accident;” (vi) “the incident was entirely foreseeable and preventable;” (vii) “there are a 

number of ways of preventing falls” over the side of an escalator, such as “to enclose the 

escalator or to guard it to or above the statutory height;” (viii) “[t]here are a number of solutions 

that escalator owners have used to minimise or eliminate the risk of falling over the handrail,” 

some of which are documented in Cooper’s report; and (ix) “some method of prevention was 

available and should have been installed as it was foreseeable that it could happen.” (Doc. 90, 

Exh. A, at 27-38.)

B. Analysis.

Defendants’ objections to the admissibility of Cooper’s proffered opinions are threefold. 

First, defendants maintain that Cooper “is not qualified to render an opinion on escalator design.” 

(Doc. 90, at 5.) Second, defendants assert that his opinions are inadmissible because he “does 

not explain what renders the design of the subject escalator unsafe,” but simply offers his ipse 

dixit that it is so. (Id. at 7-9.) Third, defendants object that Cooper provides no specifics about 

his proposal for a 42-inch guardrail, and that “Cooper’s mere observation that a 42-inch guardrail 

should have been put into place to possibly prevent the fall does not constitute reliable 

methodology.” (Id. at 9-13.) Each challenge will be addressed in turn.

With regard to qualifications, the issue is whether Cooper “is qualified to testify 

competently regarding the matters he intends to address,” through such means as “scientific 

training, education, and experience.” Seamon, 813 F.3d at 988 (citations omitted). Defendants 

posit that “Cooper has no experience – none – that qualifies him to render an opinion on the 

design of the subject escalator.” (Doc. 90, at 6.) This position cannot be reconciled with the 

record facts concerning this witness’s qualifications. After all, Cooper is a building services 

engineer who has studied escalators and escalator falls for his entire career. He has spent more 

than three decades working in and around the escalator industry, has conducted extensive 

research into escalator falls, has investigated more than 100 escalator accidents, has written 

numerous papers about escalator accidents, and has been a member of the British Standards 

panel for lifts and escalators for a quarter century.5 The Court finds that these and numerous 

 5 Given these and other record facts concerning Cooper’s qualifications, the Court 

is hard-pressed to understand the record basis for defendants’ characterization of Cooper’s 

experience as consisting of a mere “tabulation of ‘other incidents’” on escalators. (Doc. 115, at 4 

(footnote omitted).) Cooper’s education, expertise and experience render him far more than a 

(Continued)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 7 of 33
-8-

other forms of demonstrated experience and expertise render Cooper eminently well-suited to 

offer opinions as to the subject escalator’s design, whether that design was unreasonably 

dangerous, how that design may have contributed to Jakobe Kirksey’s fall, and whether other 

design alternatives might have prevented or reduced the risk of a fall.6

 

mere passive “tabulator” who has tallied up “the frequency of falls from escalators and the nature 

of those falls.” (Id.)

6 Defendants’ point is, apparently, that unless Cooper has personally designed 

escalators, he is unqualified to opine about escalator design. (Doc. 90, at 6-7.) Defendants offer 

no case law to support such a stringent construction of Rule 702’s qualifications requirement. 

Research reveals a wealth of well-reasoned authorities to the contrary. See, e.g., Lara v. Delta 

International Machinery Corp., --- F. Supp.3d ----, 2016 WL 1254023 (E.D.N.Y. Mar. 31, 2016) 

(overruling objection that expert was not qualified to testify about defective design in table saw 

because he had never designed one, where the totality of his experience, education and training 

rendered him qualified and witness’s lack of design experience goes to weight, not 

admissibility); Almonte v. Averna Vision & Robotics, Inc., 128 F. Supp.3d 729, 740 (W.D.N.Y. 

2015) (“It is not necessary that Mr. Coniglio be a mechanical engineer or have design experience 

to opine on questions relating to the safety of the unguarded Conveyor.”); Great Northern Ins. 

Co. v. BMW of North America LLC, 84 F. Supp.3d 630, 640-41 (S.D. Ohio 2015) (“[U]nder the 

facts of this case, Clarke need not have specialized knowledge of the exact component at issue, 

the stiffener plate, in order to make conclusions that assist the trier of fact. Clarke’s experience 

in the automotive industry and his observations of the vehicle and exemplar vehicles provide a 

sufficient foundation for him to opine on the vehicle defect and an alternative design.”); Hilaire 

v. DeWalt Indus. Tool Co., 54 F. Supp.3d 223, 239-40 (E.D.N.Y. 2014) (rejecting argument that 

plaintiff’s expert “is not qualified to render an expert opinion in this case because ... he has no 

education or experience in designing table saws,” where expert was a registered safety engineer 

who had inspected the subject table saw and reviewed numerous documents regarding 

safeguarding such saws); Bryant v. BGHA, Inc., 9 F. Supp.3d 1374, 1391 (M.D. Ga. 2014) 

(concluding that mechanical engineer who had investigated over 100 falls from ladders and 

published papers on ladder safety was qualified to provide expert opinions that ladder stand was 

defectively designed, even though witness lacked experience in designing commercial ladder 

stands); Romero v. ITW Food Equipment Group, LLC, 987 F. Supp.2d 93, 102-03 (D.D.C. 2013) 

(“Although Defendant objects that Kane has no specialized expertise in designing commercial 

kitchen equipment, ... Defendant does not explain why such specialized expertise is required in 

order to competently opine upon the safety of a basic mechanical device”); In re Yamaha Motor 

Corp. Rhino ATV Products Liability Litigation, 816 F. Supp.2d 442, 451-52 (W.D. Ky. 2011) 

(rejecting challenge to plaintiff’s expert, an engineer with 40 years of experience in automotive 

industry, that his “testimony should be excluded because he has no experience designing or 

evaluating off-road vehicles and because he cannot reach a conclusion about specific changes 

that Yamaha should have made to the design of the Rhino”). Cooper’s lack of experience in 

designing escalators goes to the weight, not the admissibility, of the opinions he offers in this 

case.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 8 of 33
-9-

As for defendants’ objection that Cooper fails to provide “any clear explanation as to 

what rendered the escalator ‘unreasonably dangerous’” (doc. 90, at 9), the record shows 

otherwise. Specifically, Cooper’s report delineates his opinions that “[t]he handrail was a high 

friction type which would had an effect on the victim being lifted by the handrail,” “[t]he 

handrail was low and would also have had an effect on the lifting of the victim,” “[t]he handrail 

does not constitute a guard,” and “[t]he building fabric guard was insufficient to assist in 

preventing the accident.” (Doc. 90, Exh. A, at 25.)7 Cooper’s report goes on to amplify his 

determinations regarding the inadequacy of the handrail, such as his opinions that “the fall 

hazard protection is insufficient” because of the height of the handrail, and “the floor opening in 

this case was unguarded.” (Id. at 26.) And Cooper identifies as contributory factors the “long 

drop to the side of the escalator” and “the layout of the incident escalator in an open atrium.” 

(Id. at 27.) Such a discussion, taken in the aggregate and grounded in Cooper’s extensive

experience studying and investigating escalator falls, certainly rises above the level of 

conclusory, unexplained ipse dixit (i.e., “the escalator is dangerous because I say so”). 

Defendants’ criticism that Cooper’s opinions are unreliable because he neglected to offer a “clear 

explanation as to what rendered the escalator ‘unreasonably dangerous’” is unavailing.

Finally, defendants protest that Cooper should not be allowed to testify as to the 

availability of an alternative 42-inch guardrail, inasmuch as he “does not offer any engineering 

dimensions” about such a device, does not provide “any details about how this proposed guard 

should be constructed or installed,” “performed no testing” as to such an alternative guard, and 

“does not even know if the particular ‘method’ he has proposed would have prevented the 

accident.” (Doc. 90, at 10-12.)

In his report, Cooper asserted that “[t]he International Building Code (various dates) 

requires fall hazard protection to be a minimum of 42” in height,” but that in this case “[t]he 

 7 Cooper relates these opinions to specific observations concerning the subject 

escalator. For example, he notes in his report “[t]he low handrail height compared to a hip 

height of a human,” and indicates that “the lower the handrail the greater the risk of a fall over 

the side.” (Id. at 23.) Additionally, Cooper states, “the fixed guard does not extend far enough 

beyond the newel to prevent a fall over the side. The fixed guard stops too short and should have 

extended the full length of the escalator. Even if the fixed guard had only extended the length of 

the floor plate (stopping where the escalator goes into downward transition begins) it would, in 

my opinion, have prevented the accident.” (Id. at 24.)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 9 of 33
-10-

handrail height is known to be less and the fall hazard protection is insufficient.” (Doc. 90, Exh. 

A, at 26.) To correct this dangerous condition, Cooper opined, “there are a number of ways of 

preventing falls. In my opinion the simplest method of preventing falls over the side are to 

enclose the escalator or to guard it above the statutory height.” (Id. at 29.) Cooper’s report goes 

on to identify various means of enclosing or guarding escalators from falls, such as the safety 

curtain fall protection method and the additional handrail fall protection method. (Id. at 30-37.) 

Cooper concluded by summarizing his opinion that “some method of prevention was available 

and should have been installed as it was foreseeable that it could happen.” (Id. at 38.)8 All of 

these opinions appear well within the realm of Cooper’s expertise, and defendants have not 

objected to them as far as they go.

The portion of Cooper’s testimony to which defendants do object is his opinions 

concerning the guardrail. Cooper’s opinion, quite simply, is that the building code required the 

escalator to have a guard of a minimum 42” in height, but that the escalator lacked such a device, 

and that a compliant guard should have been installed. In his own words, Cooper said, “I have 

referred to this 42-inch guard which should have been, in my opinion, at the top of the escalator 

and run all the way outside the escalator because the building code requires a 42-inch anti-fall 

guard.” (Doc. 90, Exh. C, at 116.) Cooper never designed such a guard. He did not test such a 

guard. He did not offer specifications for materials, construction, or installation of such a guard. 

He merely testified that the International Building Code required 42” fall protection and that the 

escalator should have – but did not – have such a device. There is no Daubert reliability 

problem here. To be sure, defendants are correct that Cooper neither designed nor tested a 42” 

guard for the Sears escalator, nor even offered opinions as to what materials should be used, how 

it should be installed, or whether such guarding would have prevented Jakobe’s fall. Such 

omissions may impair Kirksey’s ability to prove up all the legal elements of an AEMLD theory 

of liability at trial. They may create fertile ground for cross-examination or closing argument. 

But they do not present a Daubert problem. The specific opinions offered by Cooper to which 

 8 Cooper reiterated this assessment in his deposition, testifying that “[i]t is my 

opinion to a reasonable degree of certainty that some method of prevention was available and 

should have been installed.” (Doc. 90, Exh. C, at 181.)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 10 of 33
-11-

objection has been made satisfy the qualification, reliability and helpfulness criteria of Rule 702; 

therefore, plaintiff will be able to elicit those opinions from him at trial.9

IV. Challenge to Proposed Expert J. Barton Weeks.

A. Qualifications and Opinions.

Another expert witness identified by Kirksey is J. Barton Weeks, a registered 

professional engineer with 26 years of experience in structural and civil engineering, as well as

industrial, residential and commercial construction. (Doc. 107, Exh. C, at 1.) Weeks holds both 

a Bachelor of Science degree and a Master of Science degree in civil engineering. (Id.) As 

relevant experience, Weeks has engineered and constructed dozens of complex remodeling 

projects and residential homes, many of them in Alabama. (Id.) His experience includes 

performing home inspections, structural inspections, building code analysis, failure analysis and 

special construction inspections; and he has served as principal design engineer, construction 

manager and business consultant on everything from residential projects to large industrial 

structures. (Id.)

According to the Joint Pretrial Document, plaintiff expects to elicit opinions from Weeks 

at trial “regarding the building codes applicable to the Sears escalator area, the escalator’s 

compliance with those codes, and that the floor openings of the escalator installation required 

guarding.” (Doc. 103, Exh. 7 at 5.) In his expert report, Weeks offers the following opinions, 

among others: (i) the City of Mobile adopted the 1994 Standard Building Code via ordinance on 

May 30, 1995, and did not create any exceptions or revisions to that Code relating to escalator 

safety or guarding requirements; (ii) “[t]he escalator installation failed to provide the Code 

 9 Defendants’ Daubert Motion appears to be fueled in large part by a disconnect 

between defendants’ objections to Cooper’s opinions and the actual substance of those opinions. 

For example, defendants complain that Cooper’s methodology does not allow him “to opine that 

the utility of the alternative design outweighs the utility of the challenged design.” (Doc. 90, at 

12.) But nowhere in the cited portions of Cooper’s expert report or deposition does he purport to 

offer such an opinion. Likewise, defendants blast Cooper’s methodology as being inadequate to 

allow him to “testify that his alternative design would have even prevented the subject accident.” 

(Id. at 13.) Again, it does not appear that Cooper ever offered such an opinion in this case. Of 

course, a Daubert challenge must be directed at a putative expert’s actual opinions being offered 

in a case, rather than engaging in hypotheticals as to whether Daubert principles would have 

permitted that expert to offer additional/different opinions above and beyond those identified in 

his report or deposition testimony.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 11 of 33
-12-

prescribed minimum requirements for providing a safe guardrail system for the escalator and 

landings;” (iii) both the 1994 Standard Building Code and every other building code known to 

Weeks include “mandatory requirements for guarding (42 inches high) of open sides of floor 

openings,” and have “required handrails and guardrails to prevent fall hazards;” and (iv) in 

Weeks’ opinion, “it is clear that a building code compliant guardrail system was absent from the 

location of the fall.” (Doc. 90, Exh. E, at 2-3.)

B. Analysis.

Defendants seek exclusion of Weeks’ proffered opinions on two grounds. First, 

defendants challenge his qualifications by asserting that Weeks “does not possess any expertise 

in the application of the Alabama Building Code to escalators.” (Doc. 90, at 13.) Defendants’ 

position is that, notwithstanding his experience as a structural engineer, Weeks is not qualified to 

offer expert opinions here because he is not a certified escalator inspector, has never testified in 

an escalator case, has never designed escalator guardrails, and has not worked on projects 

involving escalators for many years. (Id. at 14-15.) Simply put, defendants object that Weeks’ 

general experience in the engineering field does not translate into qualifications that enable him 

to testify competently about building codes and escalators.

The trouble with this objection is that defendants read the “qualification” prong of Rule 

702 too stringently. “An expert is not necessarily unqualified simply because [his] experience 

does not precisely match the matter at hand. ... [S]o long as the expert is minimally qualified, 

objections to the level of the expert’s expertise go to credibility and weight, not admissibility.” 

Waite v. All Acquisition Corp., --- F. Supp.3d ----, 2016 WL 4257516, *2 (S.D. Fla. July 11, 

2016) (citations omitted).10 Always, the critical question for qualifications is whether the 

putative expert has such knowledge, skill, experience, training or education that his opinion will 

 10 See also Kipperman v. Onex Corp., 411 B.R. 805, 843 (N.D. Ga. 2009) (“an 

expert’s training does not always need to be narrowly tailored to match the exact point of dispute 

in a case”) (citations omitted); Hendrix v. Evenflo Co., 255 F.R.D. 568, 578 (N.D. Fla. 2009) (“as 

to qualification, the standard for admissibility is not stringent,” and “so long as the expert is at 

least minimally qualified, gaps in his qualifications generally will not preclude admission of his 

testimony”); Trilink Saw Chain, LLC v. Blount, Inc., 583 F. Supp.2d 1293, 1304 (N.D. Ga. 2008) 

(“an expert with the education or background to permit him to analyze a given set of 

circumstances ... can through reading, calculations, and reasoning from known scientific 

principles make himself very much an expert in [regard to] the particular product even though he 

has not had actual experience with the product”) (citations and internal quotation marks omitted). 

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 12 of 33
-13-

aid the trier of fact in understanding the evidence. The record shows that Weeks has spent 

decades as a structural engineer working with and applying building codes to particular 

industrial, commercial and residential applications in Alabama and elsewhere. Although those 

projects may not have focused on escalators, Weeks’ experience supports a conclusion that his

opinions identifying and applying the relevant building code(s) to the Sears escalator in Bel Air 

Mall in Mobile, Alabama are sufficiently grounded in his specialized knowledge and expertise to 

satisfy the liberal standard for admissibility under the “qualifications” prong of Rule 702. Stated 

differently, upon examining Weeks’ credentials in light of the subject matter of his proposed 

testimony, the Court concludes that he is qualified to offer the opinions set forth in his expert 

report.

Second, defendants take aim at the admissibility of Weeks’ opinions by framing them as 

“speculative opinions relating to what the Building Code should say as opposed to what it 

actually requires.” (Doc. 90, at 13.) In so doing, defendants seize on an isolated passage from 

Weeks’ deposition in which he testified that guardrail requirements for escalators “have not been 

codified in the building code .... We know it’s a problem we need to address, we just need to get 

it in the building code. ... I would request a building code change.” (Doc. 90, Exh. D, at 24.) 

Defendants focus on this testimony to assert that Weeks’ testimony must be excluded as “mere 

speculation” and statements of “subjective belief” regarding desired changes to the building 

code. (Doc. 90, at 16.)

Where defendants’ objection breaks down is that plaintiff does not actually intend to call 

Weeks to testify about potential revisions to building codes. Weeks is not being called to offer 

his opinions on what he thinks the building code ought to say in a perfect world, or to pontificate 

about a hypothetical building code that exists only in his imagination. To the contrary, Weeks’ 

report identifies among his opinions that the 1994 Standard Building Code governed the 

specifications of the subject escalator, that the Code “had mandatory requirements for guarding 

(42 inches high) of open sides of floor openings” and “required handrails and guardrails to 

prevent fall hazards,” and that “a building code compliant guardrail system was absent from the 

location of the fall.” (Doc. 90, Exh. E, at 2-3.) In other words, the gravamen of the opinions to 

which Weeks will testify at trial is that the Sears escalator did not comply with the applicable 

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 13 of 33
-14-

building code.11 Plaintiff is not calling him to testify about what revisions he might make to the 

building code; rather, Weeks will be offering opinions that the escalator did not comply with the 

Code as it existed at the time. There is nothing speculative about such opinions, and no attendant 

reliability problem. 

V. Challenge to Proposed Expert Traci Campbell.

A. Qualifications and Opinions.

A third expert witness identified by plaintiff is Traci Campbell, an experienced industrial 

engineer. According to the record, Campbell holds a Bachelor of Science degree in industrial 

engineering, and has spent more than 20 years working in the fields of industrial engineering and 

forensic engineering consulting. (Doc. 107, Exh. D at 1.) Her specialties include industrial 

accident reconstruction; slip, trip and fall analysis; product failure analysis; and workplace safety 

 11 Weeks’ deposition testimony was unambiguous on this point, to-wit:

“Q: And the area where he fell from the second floor, is it your opinion that it 

was unguarded, as that term is used in your industry?

A: Yes.

Q: And do you have an opinion as to whether or not the building code that 

was in effect required or did not require the area where Jakobe fell to be 

guarded?

A: It clearly – the 1994 standard building code clearly addresses floor 

openings, and that opening would fall under that classification.

Q: So is it your opinion that a guard was required by the building code for the 

area where Jakobe fell?

A: Yes.”

(Doc. 90, Exh. D, at 123.) It appears that Weeks’ opinions on this point are derived from the 

section of the building code addressing floor openings, rather than that addressing escalators. 

Defendants may disagree with that approach. If so, they are certainly free to cross-examine him 

about it. But it is inaccurate to characterize Weeks’ opinions as bald speculation concerning how 

he would modify the building code if given the chance. In their reply, defendants insist that it is 

“pure conjecture” for Weeks to opine that the spot where Jakobe fell was an unguarded floor 

opening within the meaning of the building code. (Doc. 115, at 15.) But defendants do not say 

why. Within the parameters of his expertise, Weeks may testify about what the applicable 

building code provisions are, what they mean, and how they apply to the Sears escalator in this 

case. If defendants dispute that the subject location meets the building code’s definition of an 

“unguarded floor opening,” then that is a matter for cross-examination, not exclusion. 

Defendants have identified nothing in Weeks’ expert report or deposition testimony that would 

support a determination that it was “pure conjecture” for him to opine that the spot of Jakobe’s 

fall meets the definition of an unguarded floor opening under the applicable building code. As 

presented, defendants’ objection goes to the weight, not the admissibility, of Weeks’ opinions 

under Rule 702.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 14 of 33
-15-

issues. (Id.) She has received education and training in the field of kinematics, which refers to 

“the motion that an object ... takes during an accident sequence and that is contingent upon the 

forces that are acting upon that body.” (Doc. 107, Exh. E, at 17.) She has given presentations 

and written publications in the areas of accident reconstruction and slip and fall. (Doc. 107, Exh. 

D, at 7.) And she has consulted as an expert witness in nearly 20 cases, predominantly in Florida 

and Alabama. (Id.)

According to the Joint Pretrial Document, plaintiff intends to call Campbell to testify at 

trial about “her kinematic analysis of Jakobe Kirksey’s fall, based upon surveillance video 

footage and detailed measurements of the Sears escalator and how additional guarding would 

have prevented Jakobe Kirksey’s fall.” (Doc. 103, Exh. 6, at 9.) She is also expected to offer 

opinions concerning “how failure to properly account for risk in the escalator installation played 

a role in the accident,” and to rebut defense expert opinions on the subjects of “center of gravity 

analysis of Jakobe’s fall and the benefit of the presence of additional guarding.” (Id.)

In support of her opinions in this case, Campbell has prepared two expert reports. (Doc. 

107, Exhs. F & S.) Her first report includes the following conclusions, among others: (i) if the 

silver guardrail at the top of the Sears escalator had extended for the full length of the flat part of 

the escalator, Jakobe would have had the benefit of its support and protection for an additional 

3.13 seconds, and such additional time could have enabled him “to exercise a different course of 

action” before his fall; (ii) defendants failed to exercise sound engineering practices through a 

Failure Modes and Effects Analysis, because the hazard of sitting on and falling over the 

exposed edge of the escalator handrail “was not identified and properly designed out, guarded 

against, or warned against;” (iii) defendants failed to apply the accepted practice of Safety 

Hierarchy to “identify the known and foreseeable hazards of riding the moving handrail and 

falling over the exposed edge;” and (iv) “[t]here were technically and economically feasible 

alternative designs for the escalator that would have eliminated or reduced the exposure to the 

hazard,” such as “additional guards on the end caps of the escalator,” “taller guard rails along 

side the escalator and solid walls on the exposed edges.” (Doc. 107, Exh. F, at 8.)

Meanwhile, in Campbell’s second, rebuttal report, she offered additional opinions

intended to rebut those of defendants’ expert Kathleen Allen Rodowicz, Ph.D., P.E. Campbell’s

rebuttal opinions were largely in the areas of coefficient of friction and center of gravity, and 

included the following: (i) there was a high degree of friction between the moving handrail and 

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 15 of 33
-16-

Jakobe’s shorts; (ii) that high coefficient of friction caused Jakobe’s shorts to stick to or grip the 

moving handrail, which was “an assisting factor that worked to Jakobe Kirksey’s detriment;” (iii) 

based on analysis of Jakobe’s center of gravity, “as long as the fixed guardrail is present, Jakobe 

Kirksey’s body and center of gravity will be supported by the guardrail and he will not rotate 

over the fixed guardrail;” (iv) had that guardrail been extended by 62 inches, Jakobe’s body 

would have been supported and would not have gone into the rotating and falling motion as long 

as it was supported by the fixed guardrail, allowing him additional time to select a different 

course of action before tumbling over the side; and (v) “the extension of the fixed guard rail 

could have prevented Jakobe Kirksey’s fall.” (Doc. 107, Exh. S.)

B. Analysis.

In a now-familiar pattern, defendants’ Motion to Exclude interposes objections both to 

Campbell’s qualifications and to the reliability of her opinions.

1. Objections to Qualifications.

As to the former set of objections, defendants maintain that Campbell is not qualified to 

offer opinions on the subject of escalator design, inasmuch as she has never worked at or 

consulted with an escalator company, never designed components for products that have reached 

the public, and never taken coursework specifically dealing with escalators. (Doc. 90, at 17.) 

Campbell’s “design” opinions on which defendants focus are, apparently, that alternative designs 

for the escalator could have eliminated or reduced the hazard; and that such alternatives included 

installation of additional guards at the end caps, taller guardrails alongside the escalator, solid 

walls on the exposed edges, or extension of the silver guardrail for the full length of the flat part

at the top of the escalator.

Again, Campbell is an experienced industrial engineer with an extensive background in 

the areas of industrial accident reconstruction; slip, trip and fall analysis; and workplace safety 

issues, among other things. Such expertise may not be narrowly tailored to match the exact point 

of dispute (i.e., escalator design) in this case, but neither Rule 702 nor Daubert requires it to be

so. Rather, the law is well established that “as to qualification, the standard for admissibility is 

not stringent,” and “so long as the expert is at least minimally qualified, gaps in his qualifications 

generally will not preclude admission of his testimony.” Hendrix v. Evenflo Co., 255 F.R.D. 

568, 578 (N.D. Fla. 2009); see also Waite, 2016 WL 4257516, at *2 (“An expert is not 

necessarily unqualified simply because [her] experience does not precisely match the matter at 

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 16 of 33
-17-

hand.”). The most compelling reasoning in favor of Campbell’s suitability to testify as to 

matters of escalator design in this case may be found in her own deposition testimony, to-wit:

“[W]hat I can tell you is that you don’t have to be an escalator expert in order to 

know how to guard machines and that’s what I am an expert in. And that when 

you look at the fact that this is an escalator, it could be a set of stairs, it could be a 

slide, it could be anything where a person is coming into contact with a piece of 

machinery. My job as an industrial engineer is to be able to look at that 

interaction and design ways to make it safer. And that is the expertise that’s 

needed in this case and that’s why I’m able to talk about alternative designs 

without being a structural expert, without being an escalator expert.”

(Doc. 90, Exh. F, at 139-40.)

For the reasons stated, the Court concludes that plaintiff has satisfied the qualification 

prong of the Rule 702 analysis as to proffered expert Traci Campbell. Given her expertise as an 

industrial engineer who examines interactions between people and machines and designs ways to 

make those interactions safer, Campbell is qualified to offer expert opinions here as to alternative 

designs for the Sears escalator that might have made interactions between people and that 

machine safer, notwithstanding her lack of specialized escalator experience. Defendants’ 

objections to her paucity of particularized escalator experience go to the credibility, weight and 

persuasiveness of her proffered opinions, not their admissibility.

There is, however, a small subset of Campbell’s expert opinions as to which the 

qualification element of Rule 702 is not satisfied. As one of numerous opinions set forth in her 

expert report, Campbell wrote, “Sears failed in their responsibly [sic] to provide a safe place of 

business which was free from recognized hazards that were likely to cause death or serious 

physical harm to its business invitees.” (Doc. 107, Exh. F, at 7.) Defendants correctly observe 

that this opinion amounts to a commentary on a retailer’s standard of care and whether Sears 

breached that standard of care. Defendants also correctly note that nothing in Campbell’s CV or 

expert report establishes any qualifications she might have to offer those particular opinions. In 

response, plaintiff makes no attempt to rebut defendants’ objections on this point. On this 

showing, the Court concludes that Campbell is not qualified to testify competently as to a 

retailer’s standard of care and whether Sears satisfied that standard as to the subject escalator; 

therefore, expert opinion #3 in Campbell’s report dated October 30, 2015 will be excluded from 

trial pursuant to the “qualification” prong of Rule 702.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 17 of 33
-18-

2. Objections to Opinions in Campbell’s Primary Report.

Next, defendants raise reliability objections to Campbell’s design opinions. In that 

regard, defendants first take aim at Campbell’s opinion that Sears and Schindler “failed to 

exercise sound engineering practices through the use of Failure Modes and Effects analysis” 

because they failed to identify, design out, guard against, or warn against the hazard of falling 

over the edge of a moving escalator handrail. (Doc. 107, Exh. F, at 8.) Defendants criticize 

Campbell for not using the Failure Modes and Effects methodology properly because she did not 

examine architectural design drawings, does not know specifics as to how the “design team” 

placed this escalator, and points to no particular available guarding solutions. (Doc. 90, at 19-

20.) Defendants characterize Campbell’s testimony as being nothing more than that the escalator 

must have been defectively designed because Jakobe fell. (Id. at 20-21.)

Defendants’ objections do not strip this expert’s opinion of Daubert reliability. In her 

report, Campbell explained that Failure Modes and Effects Analysis “is a step by step approach 

for identifying all possible failures in a design,” pursuant to which “[f]ailures are prioritized 

according to how serious their consequences are, how frequently they occur and how easily they 

can be detected.” (Doc. 107, Exh. F, at 7.) Campbell’s opinion is that Failure Modes and Effects 

Analysis is a “sound engineering practice” that defendants failed to follow because if they had,

then the hazard of falling over the exposed edge of the escalator would have been identified and 

“[t]he severity of the consequences from exposure to this known hazard should have prompted 

specific action.” (Id.) Thus, Campbell appears to be opining that the potential escalator design 

failure of someone falling over the edge of the moving handrail should have received high 

priority for correction given the severity of its consequences; however, we know it was not so 

prioritized because defendants did nothing to design out or guard against that potential design 

failure.

12 This reads like a straightforward application of the very methodology Campbell 

espouses. Although defendants object that Campbell failed to look at design drawings or to learn 

how this escalator was placed, they do not explain why the principles of Failure Modes and 

 12 Campbell alluded to this conclusion in her deposition testimony about risk 

tolerance, where she opined that “in this case, I don’t believe that that tolerable risk level had 

been met, that I believe there was more that could have been done considering what the 

consequences are of accidents that do happen. Even though as we talked about that they do 

happen with infrequency.” (Doc. 90, Exh F, at 138-39.)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 18 of 33
-19-

Effects Analysis required her to take into account such facts or data, or why the facts and data 

she did examine (including her on-site inspection of the escalator) were insufficient to enable her 

to perform the Failure Modes and Effects Analysis in a reliable manner as to this specific hazard. 

Nor does it appear to be a fair characterization of Campbell’s expert opinions for defendants to 

say she is “unable to point to anything except the fact that the incident occurred to suggest that 

the design was unsafe.” (Doc. 90, at 20.)13 

Also under the reliability heading, defendants are sharply critical of Campbell’s opinions 

about reasonable alternative designs. Specifically, they object that while Campbell opined that 

there were technically and economically feasible alternative designs for the escalator that would 

have reduced exposure to the hazard, “Campbell wholly failed to actually present any of those 

designs.” (Doc. 90, at 21.) It is certainly correct that this witness did not design a guard for the 

escalator. Upon repeated interrogation in her deposition, Campbell acknowledged that she “had 

 13 Defendants identify no passage in Campbell’s expert report where she opines that 

the escalator must have been defectively designed because Jakobe fell. Their argument appears 

to rest almost entirely on the following two short excerpts from her deposition:

“Q: So the fact that Jakobe Kirksey fell leads you to believe and opine that 

there was irresponsible behavior, correct?

A: At this point, yes, because there were no guards to prevent him from 

falling.”

* * *

“Q: Are you telling the ladies and gentlemen and judge in this case that 

[analysis of tolerable risk by defendants] did not happen?

A: I’m not saying that didn’t happen. What I’m saying is the end result did 

not meet with a solution that would keep Jakobe Kirksey from dying when 

he fell from this second story escalator.”

(Doc. 90, Exh. F, at 133, 140-41.) Taking these snippets of testimony out of context does a 

disservice to, and does not fairly summarize, Campbell’s opinions. Reading those deposition 

excerpts in context, along with the expert report, the Court discerns very clearly that Campbell’s 

opinion is that the absence of fall protection on an open-sided escalator was a known foreseeable 

hazard, that defendants did nothing to correct or protect against that hazard, and that whatever 

tolerable risk analysis defendants did must have been inadequate because it did not result in 

implementation of any of a number of relatively-easy, readily-available solutions to guard 

against a known risk of catastrophic injury or death. That opinion is a far cry from defendants’ 

attempt to distort Campbell’s words into an opinion that she “points to the mere fact that the 

incident occurred to prove her conclusion” (doc. 115, at 10), or that the escalator must have had a 

defect because Jakobe fell. Rule 702 principles are applied to an expert’s opinion as actually 

stated, not as the objecting party might wish it to be. 

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 19 of 33
-20-

not gone through the process of actually doing the design of those alternatives” and further

testified, “I don’t know how many more ways to tell you that I did not sit down and do an actual 

design for this case.” (Doc. 90, Exh. F, at 73-74.)14 But that is not the relevant inquiry under 

Daubert and Rule 702 principles. Movants cite no authority – and the Court is aware of none –

holding that the Federal Rules of Evidence mandate exclusion of an expert’s opinion that 

alternative designs exist unless that expert has personally undertaken to prepare such designs for 

the product or device at issue. The undersigned understands (but does not decide, in the context 

of this evidentiary motion, the legal validity of) defendants’ position that, without such specifics 

as to form of the alternative design, plaintiff’s claims fail under Alabama law. Again, however, 

this matter is before the Court on an evidentiary challenge, not a summary judgment motion. 

The pertinent question for admissibility purposes is not whether plaintiff’s case might be 

rendered legally deficient by shortcomings in her expert’s testimony, but whether there are 

sufficient indicia of reliability for the opinions she did offer to go to the jury. The Court answers 

that question in the affirmative.

Campbell’s testimony is pellucidly clear as to what her alternative design opinions are, 

and what they are not. She explained in her deposition that her opinion about technically 

feasible design alternatives was “based off of my experience and my knowledge of guarding with 

regard to what is possible with materials such as plexiglass or other materials that could be used 

for guarding, their applicability for this situation and knowing that those types of materials are 

readily available. They have been around for years and years, used in these types of situations 

for guarding.” (Doc. 90, Exh. F, at 73.) In addition to plexiglass, Campbell explained, “[t]here 

are a number of different kinds of guards that could have been used in this case ... to eliminate 

the fall hazard,” such as “having escalators that are installed side-by-side” or “having escalators 

that run along side solid walls.” (Id. at 76.) Campbell testified that “these are, again, concepts 

and ideas that have been around in engineering and in practical application for a very long time.” 

 14 Notwithstanding the clarity of Campbell’s testimony as to this point, defense 

counsel continued questioning her about whether she had actually designed an alternative 

guarding system for this escalator, prompting her to testify, “As we’ve already beat to death, I 

have not put those drawings down, but it can be done.” (Id. at 86.) Notwithstanding defendants’ 

barrage of questions about whether she had actually designed an alternative guarding system for 

the Sears escalator, Campbell was emphatic that “the fact that I haven’t done that degree of 

analysis does not negate the fact that it still can technically be done.” (Id. at 87.)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 20 of 33
-21-

(Id. at 83.) Campbell elaborated that she was discussing “alternative designs that are readily 

available, well-known in applications everywhere,” and she knew from her “education and 

training and knowledge as an engineer that these things exist. They are readily available and are 

technically feasible.” (Id. at 135.) Simply put, she testified, “[t]he materials are readily available 

and the concepts for the design are readily available,” and “the ideas and concepts for what you 

would use to do those kinds of designs are out there readily available and are economically 

feasible.” (Id. at 137, 153.) The Court finds no Daubert reliability problem with these opinions, 

which appear firmly grounded in Campbell’s professional experience and knowledge as an 

engineer, and therefore do not suffer from a lack of reliable methodology for Rule 702 purposes. 

That Campbell did not design specific alternative designs in this case is a topic for crossexamination, not a basis for wholesale exclusion of her opinions.

15

3. Objections to Opinions in Campbell’s Rebuttal Report.

As noted, Campbell also submitted a rebuttal expert report to address the opinions offered 

by defense expert witness Kathleen Allen Rodowicz, Ph.D., P.E. Defendants object to two of 

Campbell’s rebuttal opinions, to-wit: Her opinion that a high coefficient of friction between the 

escalator handrail and Jakobe’s shorts was an “assisting factor” in the accident, and her opinion 

that “extension of the guard rail could have prevented Jakobe Kirksey’s fall.” (Doc. 107, Exh. S, 

¶¶ 7, 23.) Defendants maintain that neither opinion is supported by reliable methodology.

With regard to the coefficient of friction, defendants focus on Campbell’s opinions that, 

because of the high coefficient of friction, Jakobe’s “shorts tended to ‘stick’ or grip the moving 

handrail as opposed to the moving handrail sliding along his shorts,” and that the interaction 

between handrail and shorts was thus “an assisting factor that worked to [his] detriment.” (Id., 

 15 The parties’ protracted sparring (both in their Daubert briefs and in the expert 

deposition itself) over Campbell’s alternative design opinions appears disproportionate. After 

all, in her expert report, she opines (with specific support from her own kinematic analysis in this 

case) that “[i]f the subject silver guard rail at Sears had been extended to full length of the top 

flat portion of the escalator,” it would have provided more fall protection that might have 

prevented Jakobe’s accident by giving him an additional three-plus seconds to make another 

decision (i.e., climb off the handrail) before falling. (Doc. 107, Exh. F, at 8.) That simple 

modification – extending the silver guardrail for an additional 62 inches to encompass the entire 

flat part of the top of the escalator – sounds very much like a specific alternative design. Any 

objection (which has not been voiced, in any event) that such a design concept would have been 

technically or economically unfeasible would appear of dubious merit.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 21 of 33
-22-

¶¶ 7-8.) Defendants maintain that, given Campbell’s admission that she conducted neither 

research nor testing, “it is nonsensical to conclude that Campbell relied on generally accepted 

scientific principles to reach her conclusion that frictional lifting ... contributed to the accident.” 

(Doc. 90, at 26.)

From careful review of Campbell’s rebuttal report and rebuttal deposition, the Court is 

satisfied that the Daubert reliability threshold for admissibility is satisfied. Here is why: 

Defendants’ expert, Dr. Rodowicz, calculated the coefficient of friction between the Sears 

escalator handrail and the fabric of Jakobe’s shorts at between 0.65 and 0.96.

16 Campbell, as an 

experienced industrial engineer, used her education and training to interpret those values. In 

particular, she explained that coefficients of friction are measured on a scale of between 0 and 1, 

with 0.5 being considered by the scientific community to be the tipping point for whether a 

material is slip resistant or not. (Doc. 90, Exh. H, at 29-30; doc. 107, Exh. S, ¶ 1.) Values above 

0.5 are considered slip resistant, whereas values below 0.5 are not. (Id.)

17 Based on the 

measured values reported by Dr. Rodowicz, Campbell applied these general principles of 

coefficients of friction to opine that “the type of material that Jakobe Kirksey would have been 

wearing at the time of the accident fell into the category of a high friction material that would 

 16 In her report, Dr. Rodowicz explained that she had conducted testing “to 

determine the static coefficient of friction between the escalator handrail and fabric from four 

different types of men’s pants. ... The static coefficient of friction for the materials tested ranged 

from approximately 0.65 to 0.96.” (Doc. 107, Exh. AA, at 5.) Dr. Rodowicz did not have the 

actual shorts that Jakobe was wearing at the time of the accident, so she tested four types of 

fabrics from menswear (casual dress pants, jeans, cargo shorts, and corduroy pants) to get a 

range of values in which the fabric of Jakobe’s shorts might be expected to lie.

17 Defendants complain that these standards apply only to walking surfaces and that 

Campbell’s opinion is rendered unreliable because “handrails ... are certainly not walking 

surfaces.” (Doc. 115, at 11.) This criticism overlooks Campbell’s testimony that it does not 

matter whether the surface tested is a walking surface, a handrail or anything else “[b]ecause 

coefficient of friction is a scientific principle that doesn’t change depending on your application. 

The scale is zero to one regardless of what surface that you’re going to be measuring on, and the 

values, the greater that you get to one, the more friction there is between the two surfaces that 

you are determining the coefficient between.” (Doc. 90, at 32.) In light of Campbell’s expert 

opinion about the universality of the scale for and the interpretation of coefficients of friction, 

defendants’ criticism about walking surfaces versus handrails does not negate the reliability of 

her testimony.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 22 of 33
-23-

tend to stick to the handrails as opposed to sliding on the handrails.” (Doc. 90, Exh. H, at 35.)18 

This is a simple statement of opinion, whereby an industrial engineer uses her expertise to 

explain to the jury how to interpret the coefficient of friction values measured by the defense 

expert, to-wit: that the higher coefficients of friction mean that Jakobe’s shorts would have 

tended to stick to or grip the escalator’s handrail rather than sliding off. Without question, 

Campbell’s opinion testimony on that straightforward interpretive point satisfies all Daubert

reliability criteria, notwithstanding her lack of independent testing.19

Nor does that conclusion change with regard to Campbell’s follow-up opinion. Taking 

the interpretation of the coefficients of friction one step further and viewing it in tandem with her 

kinematic analysis of Jakobe’s fall, Campbell opined that “[t]he interaction between the shorts 

and the moving handrail was an assisting factor that worked to Jakobe Kirksey’s detriment.” 

(Doc. 107, Exh. S, ¶ 8.) She did not testify that the “sticking” of clothing to handrail pulled him 

on the handrail all by itself; to the contrary, she expressly disclaimed any such opinion.20 She 

did not opine that Kirksey never would have ended up on the handrail were it not for the gripping 

interaction between his shorts and the moving rail. Nor did she testify that Kirksey was 

 18 In her testimony, Campbell made clear that she was not offering any opinions as 

to whether the Sears escalator handrail was unreasonably slippery or somehow out of step with 

industry norms as to slip resistance. (Id. (“I wasn’t being critical in terms of saying it was too 

slip resistant or not.”).) There is no suggestion anywhere in Campbell’s testimony or plaintiff’s 

briefing that the coefficients of friction yielded by the handrail on the Sears escalator amounted 

to a design defect. And Campbell confirmed that she was offering no recommendations for what 

a coefficient of friction on an escalator handrail should or should not be. (Id. at 45-46.)

19 Despite the extensive briefing on the subject in defendants’ Motion to Exclude, 

Campbell took pains in her deposition to emphasize that her opinion is a straightforward 

application of the coefficients of friction found by Dr. Rodowicz. As Campbell put it, “there’s a 

very simple point that was to be made with the coefficient of friction discussion that we’ve been 

having, that did not require any testing.” (Doc. 90, Exh. H, at 43.) Later, she reiterated the point 

that “[a]gain, this is simply a statement of the fact that his shorts are going to tend to stick to the 

handrail as it is moving and not slide off of the handrail.” (Id. at 49.)

20 The relevant deposition exchange is as follows:

“Q: Are you suggesting to the jury in this case that Jakobe Kirksey was lifted 

onto the handrail without any application of force by himself?

“A: No, I’m not.”

(Doc. 90, Exh, H, at 38-39.)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 23 of 33
-24-

involuntarily pulled onto the handrail. (Doc. 90, Exh. H, at 37 (“It’s going to be assistive 

whether it was voluntary or involuntary.”), 39 (“I don’t know if it was voluntary or not.”).) 

Rather, Campbell went no further than to opine that, “as Jakobe was interacting with the moving 

handrail, that his shorts were going to tend to stick to the handrail as opposed to sliding on the 

handrail, therefore being an assistive device to him in the accident sequence.” (Id. at 35-36.)21 

She can reliably offer that narrowly circumscribed, limited opinion about the tendency of the 

moving handrail to pull Jakobe – which again is rooted in her interpretation of the coefficients of 

friction and her kinematic analysis – without performing the testing or quantifying calculations

on which defendants insist. Campbell is careful not to offer any opinions as to whether this was 

a major factor or a minor factor in the accident. The Court is confident that defense counsel will 

be able to identify and illuminate for the jury’s benefit the clear limitations in the simple, narrow

opinions Campbell does offer on this point.22

Defendants also challenge Campbell’s rebuttal opinion that “extension of the fixed 

guardrail could have prevented Jakobe Kirksey’s fall” on the grounds that she performed no 

testing of the structural strength of the silver guardrail. (Doc. 90, at 26-27.) As noted, a 

cornerstone of Campbell’s expert opinions in this case is that “the extension of the fixed guard 

 21 Elsewhere, Campbell reframed this opinion in similarly limited terms as follows: 

“It is simply a matter of the fact that when he is coming into contact with the handrail, that his 

shorts, as well as his body, are going to tend to move along with the handrail because of the 

coefficient of friction, as one of the factors.” (Doc. 90, Exh. H, at 46.)

22 Defendants’ Daubert challenge on this point is disconnected from the exceedingly 

narrow opinion that Campbell actually offered. If she had testified that the interaction between 

Jakobe’s shorts and the rail caused him to be involuntarily lifted onto the handrail, that he never 

would have ended up on the handrail but for the interaction between clothing and moving 

machinery, that the “stickiness” overpowered his will or rendered him helpless to stay off the 

handrail, or that the slip-resistance of the handrail constituted a design defect, then defendants’ 

objections about no testing or no quantification might well resonate for Rule 702 admissibility 

purposes. But that is not what Campbell said. Instead, her very logical opinion is that (i) Dr. 

Rodowicz found a high coefficient of friction, (ii) that high coefficient of friction means that 

these surfaces were slip-resistant, (iii) Jakobe’s shorts would have a tendency to stick to or grip 

the slip-resistant handrail rather than sliding off it, and (iv) all other things being equal, this 

gripping interaction between shorts and moving handrail would be an “assistive device” or “one 

of the factors” in the accident sequence. Contrary to defendants’ Motion to Exclude, the 

admissibility of such an opinion is not rendered “nonsensical” under Daubert by her failure to 

conduct her own testing or quantify the amount of force needed.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 24 of 33
-25-

rail could have prevented Jakobe Kirksey’s fall.” (Doc. 107, Exh. S, ¶ 23.) That opinion is 

supported by multiple underlying facts, opinions and methodologies, including among others the 

following: (i) Campbell’s engineering training, education and experience; (ii) her field inspection 

and measurements at the Sears escalator; (iii) her frame-by-frame examination and kinematic 

analysis of surveillance video of the accident; (iv) her calculations about the moving handrail’s 

speed, the amount of time that Jakobe was on the handrail before falling, and the amount of 

additional time he could have remained on the handrail had the silver guardrail been extended for 

the entirety of the top flat part of the escalator; (v) her calculations of Jakobe’s center of gravity 

and where such center of gravity would have interacted with and contacted the fixed guardrail; 

(vi) her conclusion that Jakobe’s center of gravity would have been below the top of the fixed 

guardrail, such that the guardrail would have supported his body and center of gravity for as long 

as the guardrail was in place; and (vii) her assessment that if Jakobe had had a little more time 

before the guardrail ended, he might have taken action (i.e., climbed off the handrail) before the 

fall protection ended, rather than falling over the side of the escalator.

Defendants’ position is that this opinion is unreliable and inadmissible in the absence of 

any testing or analysis of the structural strength of the guardrail. (Doc. 90, at 26-27.) Evidently, 

then, defendants contend that Campbell’s opinion is speculative without some basis for 

concluding that the fixed guardrail would have been structurally strong enough to support

Jakobe’s body. That may be a fine tack for cross-examining Campbell at trial; however, it does 

not constitute a ground for excluding her opinions altogether as unreliable under a Daubert

analysis. Campbell visually inspected the guardrail. Her assumption that it would have been 

structurally sound and strong enough to support the weight of an 11-year old boy leaning into it 

from an adjacent handrail (as opposed to, say, crashing into it in an all-out sprint) is not so 

unrealistic or speculative as to deprive of it of reliability.23 In short, Campbell relied on 

 23 Campbell even allowed for the possibility that the guardrail might not have been 

strong enough to support Jakobe, as she testified, “I’m not 100 percent sure that it would have 

prevented his fall,” and indicated that her lack of quantification of the structural strength of the 

guardrail was “certainly one of” the reasons she was not certain that extending the guardrail 

would have prevented the fall. (Doc. 90, Exh. H, at 77.) This is simply not a situation in which 

an expert witness has made an unvarnished guess about something she never saw. Nor did she 

testify with false, misleading certainty about something she never tested. Campbell was entitled 

to rest her opinion on an assumption that the guardrail would not have been so flimsy as to 

(Continued)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 25 of 33
-26-

multifaceted, detailed methodology in evaluating whether extending the guardrail might have 

prevented Jakobe’s fall. Along with that methodology, she made certain facially reasonable 

assumptions, and acknowledged uncertainty in her final opinion arising from such assumptions. 

That she did not specifically test those assumptions does not render her conclusion inadmissible 

under Rule 702.

VI. Challenge to Proposed Expert Joseph L. Stabler.

A. Qualifications and Opinions.

A fourth expert designated by plaintiff is Joseph Stabler, who has “over 40 years of 

progressive hands-on experience in the elevator and escalator industry.” (Doc. 93, Exh. A, at 3.) 

Among the roles that Stabler has performed in the industry include owner/manager of an elevator 

company, sales engineer, elevator constructor, field engineer, consultant and Certified Elevator 

Inspector involved in design, construction, inspection and testing of 6,000 conveyance systems. 

(Id.)

24 He is a member of the American Society of Mechanical Engineers (“ASME”), and sits on 

its Escalator and Moving Walk Committee. (Id.) Stabler also consults with architects, 

contractors, elevator manufacturers and others concerning building codes, elevator/escalator 

codes, industry customs, practices and standards, and life safety codes. (Id.)

Plaintiff first disclosed Stabler as a rebuttal expert. According to the Joint Pretrial 

Document, Kirksey intends to call him at trial to testify in three broad areas. First, Stabler will 

“testify on the applicable escalator and building codes to the Sears escalator, the compliance of 

the escalator with such codes, and the knowledge of the industry and Defendants regarding the 

risk of falls from escalators.” (Doc. 103, Exh. 5, at 7.) Second, Stabler will testify in rebuttal of 

defense witnesses as to existing research regarding escalator falls and ways of guarding against 

them. (Id.) Third, Stabler will “testify in rebuttal as to previously-existing solutions to fall 

 

collapse or bend out of position when an 11-year old boy leaned against it while sitting on the 

moving escalator handrail 6.5 inches away.

24 These qualifications come with caveats. In his deposition, Stabler acknowledged 

that he has never designed an escalator, any components for an escalator, or any type of fall 

protection for an escalator. (Doc. 93, Exh. B, at 179-80.) Stabler also testified that he does not 

hold a license to perform escalator inspections in Alabama. (Id. at 178.)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 26 of 33
-27-

prevention, industry code group work on the subject of falls, ASME activities and minutes, and 

Schindler’s involvement with the code group.” (Id.)

B. Analysis.

As they have done with respect to each of Kirksey’s other expert witnesses, defendants 

move to exclude Stabler’s opinions pursuant to Rule 702 on both qualification and reliability 

grounds. Specifically, defendants maintain that Stabler is not qualified to render opinions as to 

escalator design, that his opinions that the escalator was unsafe are unreliable, that he does not 

offer a “methodologically-sound reasonable alternative design,” and that his opinions as to who 

bears responsibility for escalator code compliance are inadmissible. Unique to their motion to 

exclude Stabler’s opinions is defendants’ assertion that if this witness is allowed to testify at trial, 

he should be limited to testifying in a rebuttal capacity. Each of these issues will be addressed in 

turn.

1. Objections to Stabler’s Qualifications.

Defendants fail to specify precisely which of Stabler’s opinions they contend he is 

unqualified to render. Instead, they refer generically to his opinions “that the subject escalator 

was dangerous or should have been equipped with fall protection.” (Doc. 93, at 5.) The Court’s 

understanding, however, is that Stabler has offered opinions in this case as to whether the Sears 

escalator complied with applicable building codes and safety standards. These sorts of opinions 

fit comfortably within the parameters of Stabler’s expertise, particularly given his extensive 

background in working with, consulting on, and sitting on committees that consider and evaluate

safety standards and codes for escalators. As framed, defendants’ objection that Stabler is not 

qualified under Rule 702 to offer these opinions because he lacks personal experience designing 

escalators is not persuasive, and proceeds in derogation of the low threshold imposed by the 

qualification prong of the Rule 702 admissibility standard.

2. Reliability Objections to Stabler’s Opinions Concerning Unsafe 

Escalator and Alternative Design.

In terms of reliability, defendants take issue with Stabler’s opinions that the “code 

violations he believes were present in the escalator rendered the escalator unsafe and caused the 

subject accident.” (Doc. 93, at 5.) Defendants maintain that these opinions are mere ipse dixit

because Stabler does not understand the facts of the accident and performed no testing. The 

specific testimony to which defendants’ objection is directed includes Stabler’s opinions that the 

6.5-inch gap between the moving handrail and the silver guardrail was noncompliant with the 

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 27 of 33
-28-

1994 Standard Building Code, that the Code required guardrails forming a protective barrier of 

not less than 42 inches high as to unenclosed floor openings, that the Sears escalator was 

therefore in violation of the Code at the time of Jakobe’s fall, and that “the escalator should have 

been out of service if it didn’t comply with the escalator code ... at the time.” (Doc. 93, Exh. B, 

at 77.) The Court perceives no reliability problems with these opinions that would preclude their 

admissibility. It is an appropriate, permissible methodology for Stabler to apply his knowledge 

and expertise of the 1994 Standard Building Code and other industry standards/requirements to 

known facts concerning the configuration and layout of the Sears escalator to evaluate its 

compliance with those standards.

There are also no Daubert reliability issues attaching to Stabler’s follow-up testimony

that, given his opinion that the Sears escalator was not in compliance at the time of Jakobe’s fall, 

it should not have been in service. This conclusion is not undermined by defendants’ 

protestation that Stabler offered these opinions “despite not even stepping foot in Mobile.” (Doc. 

93, at 5.) Rule 702 does not require that an expert personally examine the subject escalator, or 

forbid him from using photographs, known measurements by other witnesses, and the like in 

assessing whether that escalator was or was not code-compliant.25

 25 An important clarification / distinction must be made. Defendants’ Motion 

characterizes Stabler’s opinions as being that the code violations “caused the subject accident” 

and amounted to “dangerous conditions [that] caused Jakobe Kirksey’s fall.” (Doc. 93, at 5, 10.) 

Defendants balk that Stabler cannot reliably so conclude because he “has no understanding of 

how the incident took place.” (Doc. 93, at 5, 7.) Defendants’ straw man inaccurately describes 

Stabler’s opinions. Defendants do not cite – and the undersigned has not found – any place in 

Stabler’s expert report or deposition where he offers opinions as to how Jakobe fell from the 

escalator, or what role the observed code violations played in his fall. Stabler does not testify, 

for example, that the 6.5-inch gap between moving handrail and silver guardrail contributed to 

Jakobe losing his balance and falling. Had he done so, there would have been obvious Daubert

reliability problems with those opinions, given Stabler’s lack of knowledge of the particular 

circumstances of Jakobe’s fall. But Stabler did not so opine; rather, he simply identified what he 

believed to be code violations and indicated that, as a result of such violations, the escalator 

should not have been in service. When asked whether the 6.5-inch gap contributed to Jakobe’s 

fall, Stabler testified that he did not know. (Doc. 93, Exh. B at 79.) Thus, Defendants’ Motion 

to Exclude distorts Stabler’s opinions into something they are not. He does not purport to be 

offering causation testimony, or explaining the interaction between the code violations he 

observed and Jakobe’s fall. Instead, he does nothing more than testify that certain reported 

conditions on the escalator amounted to code violations, and that the escalator should have been 

(Continued)

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 28 of 33
-29-

In their reply brief, defendants advance a new argument that Stabler’s proffered 

testimony about code violations pertaining to the 6.5-inch gap and other defects not directly 

linked to Jakobe’s fall should be excluded because it is “irrelevant and unhelpful to the jury.” 

(Doc. 118, at 4.) As an initial matter, this argument is improper because it was not fairly 

presented in defendants’ principal brief, despite having been available at that time.26 Setting 

aside the procedural defect, defendants’ “unhelpfulness” argument for excluding this aspect of 

Stabler’s opinions is unavailing. Recall that Stabler is being called as a rebuttal expert. His 

opinions concerning the Sears escalator’s code violations are rebuttal opinions. As documented 

in Stabler’s report, his opinions about code violations rebut the opinions of defense expert Davis 

L. Turner that the Sears escalator was code compliant. (Doc. 93, Exh. A, § 3.1.) If defendants 

put on expert testimony that the Sears escalator complied with all applicable code requirements 

(even as to escalator features that did not proximately cause Jakobe’s fall), then it is neither 

irrelevant nor unhelpful for plaintiff to put on expert testimony in rebuttal of those opinions.

As a further reliability argument, defendants object to Stabler’s “alternative design” 

opinions. Once again, defendants’ Motion to Exclude suffers from a lack of clarity as to 

precisely what opinions defendants find objectionable. At best, defendants cite Sections 2.6 

through 2.8 of Stabler’s report; however, those sections do not even purport to state expert 

opinions, but are instead presented under the heading “Background of escalator industry 

knowledge and research regarding falls over the side of escalators.” (Doc. 93, Exh. A, § 2.0.) 

Sections 2.6 and 2.7 document the efforts of a competitor escalator manufacturer, ThyssenKrupp 

Rulletrapper, to describe safety curtains that have been successfully applied to escalators in 

Norway for more than 40 years. (Id., §§ 2.6-2.7.) In Section 2.8, Stabler writes that because 

defendant Schindler does business in Norway, it “reasonably knew or should have known about 

 

out of service because of those violations. Those opinions – as far they go – do not fairly 

implicate any Daubert reliability concerns that might call for exclusion.

26 See, e.g., Herring v. Secretary, Dep’t of Corrections, 397 F.3d 1338, 1342 (11th

Cir. 2005) (“As we repeatedly have admonished, arguments raised for the first time in a reply 

brief are not properly before a reviewing court.”) (internal quotes omitted); Brown v. 

CitiMortgage, Inc., 817 F. Supp.2d 1328, 1332 (S.D. Ala. 2011) (explaining that “it is improper 

for a litigant to present new arguments in a reply brief” and that “[n]ew arguments presented in 

reply briefs are generally not considered by federal courts”).

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 29 of 33
-30-

the aforementioned requirements and safer alternative designs.” (Id., § 2.8.) Notwithstanding 

defendants’ objections, Stabler may testify about what others in the industry have done to 

implement fall protection solutions, particularly if (as the Court understands) he is doing so in 

rebuttal of defense expert testimony that either (i) no safer designs for escalators existed at the 

relevant times, or (ii) Schindler was unaware of available fall protection designs at the relevant 

times.27

3. Objections to Stabler’s Opinions as to Responsibility for Code 

Compliance.

Defendants also take issue with Stabler’s opinions expressed in his deposition concerning 

the obligation of the escalator installer to ensure compliance with code requirements. At the 

outset, the Court notes that Stabler’s expert report does not appear to identify any such opinions, 

nor does this particular opinion appear in plaintiff’s summary of his opinions in the Joint Pretrial 

Document. And given Stabler’s status as a rebuttal expert, it is not clear how he would offer an 

opinion as to whose responsibility it was for the Sears escalator to be code-compliant, unless of 

 27 Several other observations bear noting on this point. First, to the extent that 

defendants reiterate their argument (also advanced against multiple other plaintiff’s experts) that 

Stabler’s opinions about alternative designs are inadequate to prove Kirksey’s case under 

Alabama law, that objection is not properly presented in an evidentiary motion but should 

instead have been raised on summary judgment. Second, defendants’ objection to Stabler’s use 

of the word “safer” in describing the other designs found in industry literature is unpersuasive. 

Stabler may testify, based on his own expertise as well as his knowledge and review of such 

literature concerning the safety history of such alternative designs, that those designs are “safer” 

than that of the Sears escalator. Third, defendants correctly note that Stabler testified that he was 

not aware of any manufacturer of escalators in the United States incorporating fall protection into 

its designs in 1997. (Doc. 93, Exh. B, at 185.) But he also testified that that there was no reason 

why fall protection designs available and used in other countries in the 1990s could not have 

been incorporated into United States escalator designs at that time. As Stabler put it, “An 

escalator is an escalator in that regard. ... [I]f it’s a design they would use in Germany or Europe 

or anywhere else, they could use it anywhere.” (Id. at 149.) While defendants criticize Stabler’s 

testimony on this point as cavalier and “overly simplistic,” (doc. 118, at 5), it is permissible for 

this witness to offer an expert opinion based on his more than four decades of experience in the 

escalator industry that what was achievable in escalator design in Norway in the 1970s would 

have also been achievable for the Sears escalator in Mobile, Alabama in the mid-1990s. 

Stabler’s testimony about what escalator manufacturers were doing in other countries will thus 

not be excluded on the ground that such designs were not available in the United States. All of 

these concerns may be brought out on cross-examination; however, they do not render Stabler’s

core opinion (i.e., that other safer designs were available and being used in the escalator industry 

and that Schindler knew or should have known it) so unreliable as to be inadmissible.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 30 of 33
-31-

course a defense expert had opined on that specific topic. To be sure, in a page and a half of his 

204-page deposition transcript, Stabler fielded general questions posed by defense counsel about 

“[i]n those installations, you have been involved in ... who is, per your understanding, involved 

with assuring compliance with building codes?” (Doc. 93, Exh. B, at 40.)28 That Stabler 

answered those questions does not imply that plaintiff intends to elicit such opinions from him at 

trial. As such, this objection is perplexing because it is far from clear that Stabler even intends to 

offer that opinion on direct examination at trial.

Notwithstanding the foregoing, insofar as defendants are interposing a Daubert reliability 

challenge to this particular snippet of Stabler’s testimony, that objection is unpersuasive. 

Defendants protest that “Stabler may not purport to offer legal conclusions to a jury” regarding 

responsibility for code compliance. (Doc. 93, at 14.) However, that is not what Stabler did. 

Defense counsel asked the witness for his opinion, based on his own personal experience and 

involvement in escalator installations, as to who was involved in assuring compliance with 

building codes. Stabler’s responses to those questions were rooted in his decades of experience 

in the escalator industry, how things are “[t]ypically” done and what responsibilities he has had 

in those kinds of transactions. Stabler is plainly qualified to offer such experiential opinions, and 

his first-hand observations from personal experience supply the requisite reliability to satisfy 

Rule 702. As framed, then, this objection is overruled.

4. Miscellaneous Objections to Use of Stabler’s Testimony.

As a final grab-bag category of objections, defendants submit that Stabler should not be 

permitted to testify in plaintiff’s case-in-chief. Everyone agrees that Kirksey designated Stabler 

as a rebuttal expert. His expert report is dated March 11, 2016, which also appears to be the date 

on which Kirksey first disclosed him to defendants. (Doc. 93, Exh. A; doc. 64.) It was also the

 28 In responding to defendants’ objections to Stabler’s answers, plaintiff argues that 

Stabler “is testifying on his opinion based on facts contained in the Sears/Schindler national 

maintenance contract.” (Doc. 107, at 35.) The context and content of this testimony 

unambiguously reveals otherwise. Stabler’s deposition testimony on the obligation of an 

escalator installer to ensure code compliance was neither linked to the Sears escalator nor guided 

by applicable maintenance contract documents between Sears and Schindler; rather, Stabler 

couched his testimony in terms of what is “[t]ypically” done and what happens “when we do an 

acceptance” of an escalator. (Doc. 93, Exh. B, at 40-41.) The Court therefore cannot accept 

plaintiff’s characterization that Stabler was merely reciting what he had read in Sears/Schindler 

contractual documents.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 31 of 33
-32-

court-ordered deadline for disclosure of rebuttal expert witnesses. (See doc. 49, ¶ 8; doc. 50.) 

The underlying Rule 16(b) Scheduling Order fixed a deadline for plaintiff’s expert disclosures of 

November 2, 2015, “except that expert testimony intended solely to contradict or rebut shall be 

disclosed within the time permitted under Rule 26(a)(2)(D)(ii).” (Doc. 31, ¶ 7 (emphasis 

added).) Plaintiff did not disclose Stabler prior to the November 2 deadline; therefore, his 

involvement in this case is “solely to contradict or rebut.” In light of this procedural history, it 

would be inappropriate – and violative of the express terms in the Scheduling Order – to allow 

Kirksey to utilize Stabler’s expert testimony at trial in any capacity other than “solely to 

contradict or rebut.” Plaintiff designated him as an expert for the limited, narrow purpose of 

contradicting or rebutting defense expert testimony. Obviously, Stabler cannot perform such a 

rebuttal role in plaintiff’s case-in-chief, as defendants’ experts will not yet have testified and 

there will be nothing in the record to rebut. For these reasons, defendants’ objection to Stabler 

offering expert opinions in plaintiff’s case-in-chief is sustained.29

Finally, defendants lodge an objection to Stabler’s testimony pursuant to Rule 403, 

Fed.R.Evid., on the grounds that it is unreasonably cumulative and duplicative. On the record 

presently before the Court, it does not appear that Stabler’s rebuttal opinions will be cumulative. 

Of course, the Rule 403 determination hinges on the testimony that actually is admitted at trial. 

 29 Plaintiff’s counterarguments are not compelling. In particular, plaintiff invokes 

the Court’s discretion under Rule 611, Fed.R.Evid., as to the mode and order of examination of 

witnesses and presentation of evidence. The undersigned declines to exercise that Rule 611 

discretion to allow a witness disclosed by plaintiff as a rebuttal expert to testify to such expert 

opinions in plaintiff’s case-in-chief, before the jury has heard any of defense experts’ opinions 

that he is purportedly rebutting. The Court disagrees with plaintiff’s assessment that it would be 

“terribly inefficient” to make Stabler wait until the end of trial to testify and that Stabler’s 

rebuttal testimony “would fit most seamlessly into Plaintiff’s case in chief.” (Doc. 107, at 40.) 

Again, he was disclosed exclusively as a rebuttal expert witness. By their very nature, rebuttal 

witnesses appear and testify at the end of trial. And how could Stabler fit seamlessly into 

plaintiff’s case-in-chief when he is offering rebuttal opinions to defense experts who will not 

have testified yet? Plaintiff also indicates that Stabler may be needed to testify as a fact witness 

“to authenticate the A17.1 minutes,” and says it would “make no sense” to require Stabler to fly 

in from Missouri to give that authentication testimony, then fly back to Alabama sometime later 

to give his rebuttal opinions. (Id.) (Contrary to defendants’ characterization, such authentication 

testimony would not render Stabler a “case-in-chief expert,” but would rather be presented in his 

capacity as a fact witness. (Doc. 118, at 9.).) There may be any number of viable, acceptable 

workarounds to the practical dilemma identified by Kirksey; however, allowing Stabler to 

present expert rebuttal opinions in plaintiff’s case-in-chief is not one of them.

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 32 of 33
-33-

Without hearing the specifics of Stabler’s trial testimony in the context of the testimony given by 

other witnesses (and knowing whether Kirksey will re-call any other expert witnesses to testify 

in a rebuttal capacity and, if so, what they will say), it is not possible to evaluate defendants’ 

contentions that Stabler’s testimony will be unreasonably cumulative and duplicative. As such, 

that objection is premature.

VII. Conclusion.

For all of the foregoing reasons, it is ordered as follows:

1. Defendants’ Joint Motion to Exclude Proffered Opinion Testimony of J. Barton 

Weeks, David Cooper, and Traci Campbell (doc. 89) is granted in part, and 

denied in part. The Motion is granted insofar as plaintiffs’ expert Traci 

Campbell would offer opinions about a retailer’s standard of care and whether 

Sears satisfied that standard here. Thus, Campbell may not testify at trial as to 

opinion #3 enumerated in her expert report dated October 30, 2015. In all other 

respects, the Motion is denied; and

2. Defendants’ Joint Motion to Exclude Joseph Stabler (doc. 92) is granted in part, 

and denied in part. The Motion is granted insofar as defendants seek a ruling 

that plaintiff may not call Stabler to offer expert opinions in her case-in-chief, but 

may only call him in rebuttal of opinions offered by defense experts. This ruling 

does not bar Stabler from testifying as a fact witness in plaintiff’s case-in-chief to 

authenticate exhibits. In all other respects, the Motion is denied.

DONE and ORDERED this 20th day of September, 2016.

s/ WILLIAM H. STEELE 

CHIEF UNITED STATES DISTRICT JUDGE

Case 1:15-cv-00115-WS-N Document 137 Filed 09/21/16 Page 33 of 33