Case Title: Houston v. Delaware

Citation: 

Docket Number: 

State: delaware

Court: Delaware Supreme Court

Date: 2021-04-20T00:00:00Z

Document:
IN THE SUPREME COURT OF THE STATE OF DELAWARE 
 
NAIFECE HOUSTON, 
§ 
 
§ No. 12, 2020 
 
Defendant Below, 
§  
 
Appellant, 
§ Court Below: Superior Court 
 
§ of the State of Delaware  
 
v. 
§  
 
§ ID No. 1901017650(N) 
STATE OF DELAWARE, 
§ 
              
§ 
Plaintiff Below, 
§ 
Appellee. 
§  
 
Submitted: February 3, 2021 
Decided: 
April 20, 2021 
 
Before SEITZ, Chief Justice; VALIHURA, VAUGHN, TRAYNOR, and 
MONTGOMERY-REEVES, Justices, constituting the Court en Banc. 
 
Upon appeal from the Superior Court.  AFFIRMED. 
 
Benjamin S. Gifford, IV, Esquire, THE LAW OFFICE OF BENJAMIN S. 
GIFFORD, IV, Wilmington, Delaware, for Appellant Naifece Houston. 
 
Andrew J. Vella, Esquire, DELAWARE DEPARTMENT OF JUSTICE, 
Wilmington, Delaware, for Appellee State of Delaware.   
 
 
 
 
 
 
 
2 
 
TRAYNOR, Justice: 
 
The defendant, who was charged with drug offenses following a traffic stop, 
moved to suppress evidence on various grounds, including that the arresting officers 
impermissibly extended the stop to allow time for a drug-sniffing dog to arrive.  In 
his motion to suppress, the defendant asked the Superior Court to hold a Daubert1 
hearing so that he could contest the admissibility of testimony from one of the 
arresting officers that he could detect an odor at the scene emanating from the 
defendant’s car—a “chemically smell” that the officer associated with large amounts 
of cocaine.  Because the officer’s testimony was based on his training and experience 
as a police officer, according to the defendant, it was “expert in nature,”2 triggering 
the trial court’s gatekeeping function under Daubert and its progeny. 
 
The Superior Court disagreed, concluding that the officer’s testimony was not 
based on scientific, technical, or other specialized knowledge, but, rather, was lay 
opinion testimony admissible under Delaware Rule of Evidence 701.  This, the 
defendant submits, was legal error in the absence of which his motion to suppress 
would have been granted.  And had the defendant’s motion been granted, the State 
would have been left with no evidence that he was guilty of the drug offenses with 
 
1 Daubert v. Merrill Dow Pharm. Inc., 509 U.S. 579 (1993); see Rodriguez v. State, 30 A.3d 764, 
768–69 (Del. 2011); M.G. Bancorporation, Inc. v. Le Beau, 737 A.2d 513, 521–22 (Del. 1999). 
2 Opening Br. at 21. 
3 
 
which he was charged; he therefore asks us to reverse his convictions of those 
offenses. 
 
In this opinion, we conclude that both the defendant and the State—and 
ultimately the Superior Court—mistakenly framed the issue in the proceedings 
below as hinging upon the admissibility of the officer’s testimony under the rules of 
evidence governing opinion testimony.  It has long been the case that, at a 
suppression hearing, a trial court may rely on evidence that would not be admissible 
at trial.  This is so because “the rules of evidence normally applicable to criminal 
trials do not operate with full force at hearings before the judge to determine the 
admissibility of evidence.”3  Thus, the true question before the Superior Court was 
whether the challenged testimony was sufficiently reliable to justify the officer’s 
suspicion that there was cocaine in the defendant’s car.  And the Superior Court’s 
answer to that question is committed to its sound discretion.  For the reasons that 
follow, we conclude that the court’s admission of the officer’s testimony was not an 
abuse of discretion.  Thus, we affirm. 
I. 
 
As midnight approached on a January evening in 2019, Detective Matthew 
Radcliffe and Corporal Eric Saccomanno of the Delaware State Police were 
traveling behind a Chevrolet Malibu with a Florida registration on Memorial Drive 
 
3 United States v. Matlock, 415 U.S. 164, 172–73 (1974); see also D.R.E. 104. 
4 
 
near its intersection with New Castle Avenue in New Castle County.  Though both 
officers are members of the Governor’s Task Force—a unit according to Detective 
Radcliffe, that “monitor[s] probationers, high crime areas, drug activities[,] and 
violent offenders”4—Corporal Saccomanno later reported that, on that evening, the 
officers were “conducting traffic enforcement.”5  Both officers observed the Malibu 
crossing the white fog line on the right side of the road several times.  Detective 
Radcliffe described the Malibu’s path as “drift[ing] into the shoulder portion then 
back on the roadway numerous times.”6  Concerned that the Malibu’s driver might 
be intoxicated in what Corporal Saccomanno described as a “high pedestrian traffic 
area,”7 the officers pulled the Malibu over and, as they did, notified a nearby K9 
officer with a “narcotic trained K9 dog,”8 of the impending stop. 
 
After the Malibu stopped, both officers approached its passenger side from 
the rear.  There was but one person in the Malibu—Naifece Houston, the driver.  
Detective Radcliffe stood behind Corporal Saccomanno, who had engaged with 
Houston, and observed that Houston appeared to be out of sorts.  In Detective 
Radcliffe’s words: 
He was extremely nervous to the point where I could see him trying to 
control his breathing with his chest going up and down.  And his hands 
 
4 App. to Opening Br. A66. 
5 Adult Complaint and Warrant, Ex. B ¶ 1, State v. Houston, Justice of the Peace Court No. 11, 
Case No. 19-01-017650 (Jan. 29, 2019). 
6 App. to Opening Br. at A67.  
7 Adult Complaint and Warrant, supra note 5, at Ex. B ¶ 2. 
8 App. to Opening Br. at A155. 
5 
 
were sort of shaking to the point where he was fumbling with the 
credentials, . . . license and the other documents with the car stop.9 
 
Houston’s behavior, which included “looking around [as if for] an avenue of 
escape”10 caused Detective Radcliffe concern that Houston “could possibly take off 
with the vehicle at that time.”11 
 
When Corporal Saccomanno obtained Houston’s credentials and returned to 
the patrol car to run Houston’s information through the National Crime Information 
Center database—Houston was carrying a Pennsylvania driver’s license—Detective 
Radcliffe remained at the vehicle and talked to Houston.  When Radcliffe asked 
Houston whether he had been drinking and why he was so nervous, Houston 
responded that he had not been drinking and was just tired.  After this discussion, 
Radcliffe returned to his patrol car, while keeping an eye on Houston, to check 
Saccomanno’s progress with Houston’s information.  At that time, the database 
inquiry was still being processed. 
 
While back at the patrol car, Radcliffe witnessed Houston peering back at the 
officers through his rearview mirror while also examining the gear selector and 
steering wheel.  This, coupled with Houston’s general state of nervousness, led 
Radcliffe to fear Houston might flee the scene.  Consequently, Radcliffe returned to 
 
9 Id. at A60. 
10 Id. 
11 Id. 
6 
 
the driver side of the vehicle with the intention of removing Houston from the 
vehicle to prevent a potentially dangerous vehicle-flight situation.  In the suppression 
hearing testimony at the heart of this appeal, Detective Radcliffe testified that when 
he “re-approached Houston on the driver side [of the Malibu], [Houston] opened the 
window and [Radcliffe] smelled a slight odor of a chemically smell that’s consistent 
with [him] to an odor of cocaine.”12 
 
At Detective Radcliffe’s request, Houston got out of the car, but his demeanor, 
according to Radcliffe, suggested that he was considering flight, which caused 
Radcliffe to instruct Houston to lean against the car and to keep his legs crossed.  
Houston’s refusal to keep his legs crossed troubled Radcliffe, who then informed 
Houston, in an apparent effort to gain Houston’s cooperation, that a police K9 unit 
was “literally right down the street”13 and would be arriving momentarily.  
 
Shortly after that, another Delaware State Police detective arrived on the 
scene, looked into the car through an open window, and noticed a plastic bag 
protruding from a “void”14 below the console.  According to Detective Radcliffe, 
such “voids” are commonly used to store drugs and contraband.  In any event, after 
the detective observed the plastic bag, Houston “took off”15 running.  The police 
 
12 Id. at A72. 
13 Id. at A120. 
14 Id. 
15 Id. at A121. 
7 
 
gave chase on foot and, with the help of a taser, caught and subdued Houston, and 
placed him under arrest.  Although the K9 unit arrived on the scene around the time 
that Houston fled, it does not appear as though the drug-sniffing dog ever sniffed the 
exterior of Houston’s car.   
 
Instead, the car was towed and, during an inventory search of Houston’s car, 
the police removed the plastic bag from the void under the Malibu’s console and in 
it found a large quantity of a substance suspected to be cocaine.  The Division of 
Forensic Science eventually tested the substance, confirming that it was indeed 
cocaine weighing a little over 133 grams.   
II. 
A. 
 
Houston moved to suppress the evidence seized from his car, namely the 
cocaine and an iPhone, on three grounds.  First, Houston contended that the police 
lacked reasonable articulable suspicion to stop his vehicle.  Next, he claimed that 
“[t]he authorities impermissibly extended the scope of the traffic stop when they 
informed Mr. Houston he would have to wait for a K-9 unit to arrive at the scene.”16  
In furtherance of this claim, Houston noted that the State might rely on Detective 
Radcliffe’s “alleged detection of a ‘faint odor of cocaine,’”17 and requested a 
 
16 Id. at A16. 
17 Id. at A22 (quoting the probable cause sheet attached to Corporal Saccomanno’s search warrant 
application at A36). 
8 
 
Daubert18 hearing “to ascertain the officer’s training and experience in drug 
detection, as well as the ability for any human being to detect an odor of cocaine.”19  
And last, he challenged the search warrant authorizing the search of Houston’s 
cellphone because it did not establish a nexus between any crime and the phone.  
This last ground was mooted when the State agreed not to enter any evidence 
obtained from the cell phone during the prosecution’s case-in-chief. 
B. 
 
At the outset of the hearing on Houston’s motion, at which the State’s sole 
witness was Detective Radcliffe, the Superior Court deferred consideration of 
whether a Daubert hearing would be appropriate.  But when Detective Radcliffe 
testified that, when he returned to Houston’s vehicle as Corporal Saccomanno was 
“still doing the computer checks . . . [he] smelled a slight odor of a chemically smell 
that’s consistent with [him] to an odor of cocaine,”20 the court interrupted the 
testimony to hear from counsel regarding “the Daubert issue.”21 
 
18 In Daubert v. Merrell Dow Pharm., Inc., the United States Supreme Court announced the 
standards for determining the admissibility of expert-opinion testimony under Federal Rule of 
Evidence 702, which is almost identical to D.R.E. 702.  509 U.S. 579.  In M.G. Bancorporation, 
Inc. v. Le Beau,  this Court adopted Daubert and its progeny as “the correct interpretation of . . . 
[D.R.E.] 702.”  737 A.2d at 522.  Because we conclude that the application of Daubert’s standards 
was not required under the circumstances presented here, a recitation of those standards is 
unnecessary. 
19 App. to Opening Br. at A22–23. 
20 Id. at A72. 
21 Id. 
9 
 
 
On both sides, counsel’s argument focused on whether Detective Radcliffe’s 
testimony was offered as an expert opinion under D.R.E. 702 subject to Daubert’s 
strictures—Houston’s position—or, as the State contended, was admissible lay-
opinion testimony under D.R.E. 701.  Although the State made passing references 
to the fact that the issue in play during the suppression hearing was “probable cause 
to search a vehicle,”22 neither side addressed the fact that Detective Radcliffe was 
not offering an opinion that what he smelled was in fact cocaine, but, rather, that the 
odor caused him to suspect the presence of cocaine. 
 
Having heard from counsel and before ruling on the necessity of the Daubert 
inquiry, the court invited the State to question Detective Radcliffe about “his 
experience with smelling what is represented to be an odor of cocaine”23 and the 
defense to follow up with cross-examination.  During this background testimony, 
Radcliffe testified that his entire career focused on drug investigations, beginning 
with the New Jersey Street Crimes Unit in 2007.  He then became a Delaware State 
Trooper in 2012 and joined the Governor’s Task Force, which, among other things, 
investigates drug activity in Delaware.  He is also a sworn task force officer in the 
Drug Enforcement Administration, working on drug investigations.  Radcliffe holds 
 
22 Id. at A87. 
23 Id. at A89. 
10 
 
a bachelor’s degree in Criminal Justice with a minor in Forensic Investigations from 
Stockton University.  He could not remember if he had taken any chemistry courses. 
 
Radcliffe testified that he had encountered the odor of cocaine in connection 
with “[h]undreds if not thousands of cocaine-related arrests.”24  When asked to 
describe the odor specifically, Radcliffe stated that “[the chemical odor] is very 
specific to . . . just like weed has a distinct smell, alcohol has a distinct smell, this 
chemical odor is very distinct to cocaine.”25  Including the odor of cocaine, Radcliffe 
is familiar with the smell of alcohol, marijuana, and PCP.  Radcliffe agreed that his 
ability to perceive these odors, including cocaine, stems from his field experience.  
He explained, 
[f]ortunately, I have been doing this for many years, and with that 
experience brings experiences of other . . . car stops and seizures and    
. . . I have been involved in things such as upwards of 10-kilo grams or 
bricks of cocaine, and that same smell is the same as 100-plus grams of 
cocaine.26 
 
 
During cross-examination, Radcliffe testified that, as a result of his experience 
and training as a police officer, he possessed thorough knowledge of the process 
cocaine undergoes, once in brick form, to produce either powder or crack cocaine.  
 
24 Id. at A92. 
25 Id., see id. at A106 (“As familiar [as] I am with weed, I’m that familiar with the smell of 
cocaine.”).   
26 Id. at A106–07. 
11 
 
But Radcliffe admitted that he was unfamiliar with the chemical makeup of cocaine, 
other drugs, or the agents used to cut cocaine. 
 
After considering this voir dire examination, the court determined that 
Detective Radcliffe’s testimony that he detected an odor that he associated with 
cocaine was not an expert opinion within the meaning of D.R.E. 702.  This testimony 
was not, in the court’s view, based on scientific, technical, or other specialized 
knowledge, which is a hallmark of expert-opinion testimony under D.R.E. 702.  
Instead, the court viewed the challenged testimony in the same light as the testimony 
of nonexperts, routinely admitted in the courts of this State, regarding the odor of 
alcohol and marijuana.27  And because the testimony was rationally based on 
Detective Radcliffe’s perception, the court ruled that it was admissible lay-opinion 
testimony and that, therefore, no Daubert hearing was required. 
 
Detective Radcliffe’s testimony resumed and, at its conclusion, the Superior 
Court denied Houston’s motion to suppress.  In short, the court found that the 
officers’ observation of Houston’s car crossing the white fog line numerous times 
supported a reasonable suspicion and justified the traffic stop.  What followed, 
according to the court, “unfolded in an orderly,” if “fast moving” pace.28  And 
because Detective Radcliffe detected the odor of cocaine and Houston fled before 
 
27 See, e.g., Jenkins v. State, 970 A.2d 154 (Del. 2009) (odor of marijuana); Bease v. State, 884 
A.2d 495 (Del. 2005) (odor of alcohol). 
28 App. to Opening Br. at A182. 
12 
 
the police could issue a traffic citation, the court rejected Houston’s claim that the 
police had impermissibly extended the traffic stop to conduct a separate 
investigation. 
C. 
 
Upon the failure of Houston’s motion to suppress, Houston informed the 
Superior Court that he wished to waive his right to a jury trial and to proceed with a 
stipulated bench trial.  After the court confirmed by way of a colloquy with Houston 
that he understood his trial rights, the court held a bench trial as requested.  The State 
entered the stipulation of facts into evidence and immediately rested, and the defense 
presented no evidence.  The Superior Court then found Houston guilty of aggravated 
possession of cocaine (tier 5), misdemeanor resisting arrest, and a motor vehicle 
violation for failing to maintain a traffic lane.  After that, the court sentenced 
Houston to two years incarceration followed by probation, and Houston appealed.   
D. 
 
In this appeal, Houston raises a single issue: he claims that the Superior Court 
committed reversible error when it allowed Detective Radcliffe to testify during the 
suppression hearing that he detected an odor that he associated with cocaine 
emanating from Houston’s vehicle.  According to Houston, without that testimony, 
13 
 
the court would have been compelled to find that the police “lacked the reasonable 
suspicion necessary to extend the traffic stop beyond its original scope.”29 
III. 
 
This Court reviews a trial court’s decision to grant or deny a motion to 
suppress for abuse of discretion.30  Likewise, “[w]e review a trial judge’s evidentiary 
rulings for abuse of discretion.”31 
IV. 
A. 
 
Police may stop and detain a motorist whom they reasonably suspect of 
criminal activity, which includes violation of our traffic laws.32  In the Superior 
Court, Houston argued that the police lacked a reasonable articulable suspicion that 
he had violated a motor vehicle law and that, in consequence, the stop of his vehicle 
was unlawful.  The court rejected that claim, crediting Detective Radcliffe’s 
testimony that Houston’s vehicle failed to remain in its lane “numerous times”33 in 
violation of 21 Del. C. § 4122(1).34  Houston has not appealed that determination; 
instead, he asks us to conclude that the police, relying exclusively on Radcliffe’s 
 
29 Opening Br. at 33. 
30 Valentine v. State, 207 A.2d 566, 570 (Del. 2019). 
31 Jones v. State, 940 A.2d 1, 9 (Del. 2007). 
32 State v. Prouse, 382 A.2d 1359, 1364 (Del. 1978), aff’d, 440 U.S. 648 (1979). 
33 App. to Opening Br. at A67; A180. 
34 21 Del. C. § 4122(1) (“A vehicle shall be driven as nearly as practicable entirely within a single 
lane and shall not be moved from such lane until the driver has first ascertained that such 
movement can be made with safety.”). 
14 
 
purported detection of a scent he associated with cocaine, impermissibly extended 
the scope of the traffic stop to undertake a second, unrelated investigation.   
 
Houston’s argument is predicated on the framework this Court adopted in 
Caldwell v. State35 for reviewing a traffic stop that morphs into an investigation of 
other criminal activity not necessarily related to the traffic violation: 
The duration and execution of a traffic stop is necessarily limited by the 
initial purpose of the stop . . . .  [A]ny investigation of the vehicle or its 
occupants beyond that required to complete the purpose of the traffic 
stop constitutes a separate seizure that must be supported by 
independent facts sufficient to justify the additional intrusion.  Once the 
officer has issued a citation or warning and has run routine computer 
checks, the vehicle must be released unless the driver voluntarily 
consents to further questioning or the officer uncovers facts that 
independently warrant additional investigation.  In short, an officer’s 
observation of a traffic violation “does not confer the right to abandon 
or never begin to take action related to the traffic laws and, instead, to 
attempt to secure a waiver of Fourth Amendment rights.”36 
 
Houston argues that, but for the trial court’s wrongful admission of Radcliffe’s 
testimony about the “chemically” odor, there would have been no evidence 
independent of the traffic violation to justify extending the stop to search for drugs. 
 
Houston’s argument falls short of the mark in two important respects.  First, 
the suppression hearing record does not support his factual contention that, before 
Houston fled the scene, the police engaged in investigative activity “beyond that 
 
35 780 A.2d 1037 (Del. 2001). 
36 Id. at 1047–48 (footnotes omitted) (quoting Charity v. State, 753 A.2d 556, 572 (Md. Ct. Spec. 
App. 2000)). 
15 
 
required to complete the purpose of the traffic stop.”37  And even if we were to grant 
that the scope or duration of the stop was expanded upon Detective Radcliffe’s 
detection of the odor he associates with cocaine, we find no constitutional fault with 
that. 
B. 
 
Although Houston alleges that Detective Radcliffe and Corporal Saccomanno 
impermissibly extended Houston’s detention—initially justified as a traffic stop—
to conduct a separate investigation for possible drug offenses, the Superior Court’s 
factual findings suggest otherwise.  Houston’s claim rests largely on Detective 
Radcliffe’s testimony that, as he stood with Houston, trying to forestall him from 
fleeing by directing him to cross his legs, he considered “stall[ing] for . . . a couple 
of seconds before the K9 got there . . . [because], if [detainees] hear a dog barking 
they are not going to run.”38  From this statement, Houston argues that Detective 
Radcliffe prolonged the stop in a manner that was condemned in State v. Dillard.39 
 
In Dillard, however, the Superior Court found as a matter of fact that the 
officer who initiated the traffic stop “detoured from his task of issuing a ticket to 
make the call to [another officer] and wait for the K-9 Unit to arrive.”40  The court 
 
37 Id. 
38 App. to Opening Br. at A152. 
39 2018 WL 1382394 (Del. Super. Ct. Mar. 16, 2018), aff’d, 207 A.3d 136, 2019 WL 1076869 
(Del. Mar. 7, 2019) (TABLE).   
40 Id. at *6. 
16 
 
found that this activity “prolonged the traffic stop solely to investigate drug related 
criminal activity.”41  Thus, “the traffic stop ended and became a second detention,”42 
requiring independent reasonable suspicion.  Notably, in response to the State’s 
motion for reargument in Dillard, the Superior Court emphasized that its conclusion 
that there had been a measurable extension of the stop was the product of “its fact-
specific analysis of [the] stop as to both duration and scope.”43 
 
Here, the Superior Court did not find that the officers detoured from the task 
of issuing a traffic citation or prolonged the stop in any measurable fashion before 
Houston’s flight transformed the nature of the encounter.  On the contrary, the court 
found that “the investigation seems to have unfolded in an orderly sequential pace,”44 
as part of a “fast moving continuum.”45  And though the court recognized that 
Detective Radcliffe was prepared to extend the stop—an extension the court found 
justifiable because of the officer’s detection of the cocaine odor—that never 
happened because Houston fled.  The court found further that, as of the moment of 
Houston’s flight, Corporal Saccomanno had not yet completed his check of 
Houston’s capias status or issued a traffic citation, noting that Houston fled during 
 
41 Id. 
42 Id. 
43 State v. Dillard, 2018 WL 2264414, at *2 (Del. Super. Ct. May 17, 2018) (Order) (emphasis in 
original). 
44 App. to Opening Br. at A182. 
45 Id. 
17 
 
the “necessary period of time”46 it took Saccomanno to accomplish those tasks.  
Because these factual findings, which undermine Houston’s contention that his 
detention was unlawful under Caldwell, are supported by the record, we conclude 
that the Superior Court did not abuse its discretion in denying Houston’s motion to 
suppress. 
C. 
 
Although we have concluded that the Superior Court’s factual findings 
support its ultimate decision separate and apart from its consideration of Detective 
Radcliffe’s testimony about the “chemically” odor he detected, we nevertheless 
address Houston’s claim that “[t]he Superior Court failed in its role as gatekeeper 
when it allowed Detective Radcliffe to testify that he purportedly detected the ‘odor 
of cocaine,’ despite the officer’s testimony that such ability was solely based on his 
training and experience and therefore expert in nature.”47  In the Superior Court, the 
State opposed Houston’s request for a Daubert hearing, contending that the 
challenged testimony, though based on the officer’s training and experience, was lay 
opinion testimony admissible under D.R.E. 701.  The court agreed with the State and 
allowed the testimony to stand, but only after allowing Houston the opportunity to 
 
46 Id. at A184. 
47 Opening Br. at 21. 
18 
 
conduct an extensive voir dire examination of Detective Radcliffe about his relevant 
training and experience. 
 
Houston contends that the Superior Court’s admission of Detective 
Radcliffe’s testimony was contrary to this Court’s decisions in the Seward v. 
State48and Norman v. State.49  But only a superficial reading of those cases, coupled 
with a distortion of the actual testimony, would support Houston’s argument. 
 
In Seward, the defendant was convicted of delivery of cocaine based on, 
among other things, a police officer’s surveillance of several hand-to-hand 
exchanges, between Seward and another man named Collins, of small white rocks 
that appeared to the officer to be crack cocaine.  After one such exchange and as two 
other officers arrived on the scene to apprehend Collins, he reached in his pocket 
and put something in his mouth.  After a struggle, “four or five small white chunky 
pebbles or rocks came out of Collins’ mouth.”50  The pebbles were later tested by a 
forensic chemist, whose report was admitted at trial, and determined to contain crack 
cocaine. 
 
During Seward’s trial, the officer who had observed the exchanges between 
Seward and Collins was permitted to testify as a lay witness, over Seward’s 
objection, that the substance exchanged between the two men looked like crack 
 
48 723 A.2d 365 (Del. 1999). 
49 968 A.2d 27 (Del. 2009). 
50 Seward, 723 A.2d at 368. 
19 
 
cocaine.  This Court disagreed with the trial court’s ruling, in part because the State 
conceded at oral argument that “the officer’s testimony identifying the substance as 
crack cocaine was not within the common knowledge of a lay person and therefore 
the officer improperly testified as an expert.”51  We noted that 
[t]he trial court overruled Seward’s objection and found that a police 
officer could testify what cocaine looked like because it was in the 
common knowledge of a police officer and did not rise to the level of 
expert testimony.  Because, however, under the circumstances of this 
case, what the officers perceived could have been communicated 
accurately and fully by describing the substance, it was improper to 
allow the officers to express their opinion that the substance was crack 
cocaine.52  
 
 
Because the trial court later instructed the jury to disregard the officer’s 
testimony referring to the substance as crack cocaine, this Court determined that 
Seward was not substantially prejudiced by the error, and his conviction was 
affirmed. 
 
In Norman, the prosecution sought to prove that two bags seized from Norman 
at the time of his arrest and taken from Norman’s murder victim contained 
marijuana.  Although Norman was charged with murder, he was also charged with 
possession with intent to deliver marijuana.  Because of a delay in producing the 
 
51 Id. at 373 (footnote omitted).  Because the Court’s decision was based on D.R.E. 701(1)—that 
is, because it went beyond what the witness had perceived—it did not address whether identifying 
the substance as crack cocaine required special knowledge, skill, experience or training under 
D.R.E. 701(2).  Id. at 373 n.26. 
52 Id. at 372–73 (footnote omitted).   
20 
 
forensic chemist’s report identifying the seized substances as marijuana, the trial 
court excluded the report and the chemist’s testimony.  Lacking this evidence, the 
State offered testimony from three police officers who testified that the substances 
were marijuana or had the characteristics of marijuana. 
 
On appeal, this Court held that “the officers should not have been allowed to 
identify the marijuana they seized from Norman,”53 and commented on how the case 
resembled Seward: 
In Seward v. State, this Court held that police officers could not testify, 
as lay witnesses, that a substance was cocaine.  The Seward court noted 
that, although the police officers were offered as lay witnesses who 
could identify cocaine based on their common knowledge, the officers 
actually were testifying as experts without being qualified.  The same 
thing happened in this case.54 
 
 
But the problem for Houston is that the same thing did not happen in this case.  
In both Seward and Norman, the challenged testimony was offered at trial to prove 
that the substances in questions were, in fact, controlled substances.  By contrast, 
Detective Radcliffe’s testimony was that he noticed an odor that he “associate[d] 
with cocaine,”55 tying that association to his considerable experience with drug 
investigations: 
[T]he chemical smell that I described to be chemically is very distinct 
and I can only associate it with cocaine. 
 
53 Norman, 968 A.2d at 31. 
54 Id. (footnotes omitted). 
55 App. to Opening Br. at A103. 
21 
 
 
And over the years of my . . . experience of drug investigations 
that same smell, when I have smelled that chemically smell, has always 
produced a large bulk quantity of cocaine.56 
 
And, critically, this observation was not offered during Houston’s trial but during a 
hearing on Houston’s motion to suppress where the reasonableness of Detective 
Radcliffe’s suspicion, and not the actual nature of the substance whose odor was 
detected, was at issue.  These distinctions, in our view, render Seward and Norman 
inapposite.57 
D. 
 
Although the parties—and especially Houston—have focused their arguments 
on whether Detective Radcliffe’s testimony about the smell he associated with 
cocaine was an expert opinion or a lay opinion, we do not see the resolution of 
Houston’s argument as hinging on those classifications.  Implicit in Houston’s 
contention that the classification is relevant is his belief that when the Superior Court 
engaged in its totality-of-the-circumstances analysis to determine the reasonableness 
of Detective Radcliffe’s suspicion that there was cocaine in Houston’s car, it could 
 
56 Id.  
57  Houston also points us to a decision of Massachusetts trial court that rejected a police officer’s 
suppression-hearing testimony about cocaine’s distinct odor because it could not pass muster under 
Daubert.  Commonwealth v. Corniel, 2005 WL 1668448, at *5 (Mass. Super. Ct. June 23, 2005).  
We note that Corniel has not since been cited by any other court; but more to the point, as explained 
below, we reject its fundamental premise that a police officer’s suppression-hearing testimony, 
based on his law-enforcement experience, regarding the significance of a particular odor must meet 
Daubert’s standards. 
22 
 
only consider evidence that would be admissible in a criminal trial.  This belief is 
inconsistent with search-and-seizure law. 
 
The United States Supreme Court recognized long ago in Brinegar v. United 
States that there is a “difference between [w]hat is required to prove guilt in a 
criminal case and what is required to show probable cause for arrest or search.”58  
The Court observed that, if the evidentiary standards applicable at trial were to be 
applied in proceedings whose purpose was to determine probable cause for an arrest 
or for a search and seizure, “few indeed would be the situations in which an officer, 
charged with protecting the public interest by enforcing the law, could take effective 
action toward that end.”59  Pointing to the obvious distinction between findings of 
guilt and probable cause determinations, the Brinegar majority wrote that: 
[i]n dealing with probable cause . . . as the very name implies, we deal 
with probabilities.  These are not technical; they are factual and 
practical considerations of everyday life on which reasonable and 
prudent men, not legal technicians, act.  The standard of proof is 
accordingly correlative to what must be proved.60 
 
 
Consistent with this distinction, in United States v. Raddatz, the Supreme 
Court stated more specifically that “[a]t a suppression hearing, the court may rely on 
 
58 Brinegar v. United States, 338 U.S. 160, 173 (1949). 
59 Id. at 174. 
60 Id. at 175. 
23 
 
hearsay and other evidence, even though that evidence would not be admissible at 
trial.”61 
 
That the courts of this State have adhered to a relaxed evidentiary standard 
when assessing the issues of probable cause and reasonable suspicion is evidenced 
by a plethora of decisions recognizing the propriety of considering informant 
hearsay—subject 
to 
reliability 
considerations—at 
suppression 
hearings.62  
Moreover, this rule is widely recognized among our sister state courts.63  Thus, we 
do not hesitate to state explicitly what has resided implicitly in the practice of our 
trial courts and in our search-and-seizure jurisprudence:  at a suppression hearing, 
 
61 United States v. Raddatz, 447 U.S. 667, 679 (1980). 
62  See, e.g., Valentine v. State, 207 A.3d 566 (Del. 2019); State v. Holden, 60 A.3d 1110 (Del. 
2013); LeGrande v. State, 947 A.2d 1103 (Del. 2008).  
63 See State v. Zamzow, 892 N.W.2d 637, 639 (Wis. 2017) (holding that the Confrontation Clause 
did not preclude the trial court’s reliance on a deceased officer’s recorded statement to make a 
reasonable suspicion determination at a suppression hearing); State v. Bivins, 140 A.3d 524, 531–
32 (N.J. 2016) (“[H]earsay is permissible in suppression hearings . . . [which] may include 
evidence inadmissible in the trial on the merits.”) (citations and quotations omitted)); State v. 
Piper, 855 N.W.2d 1, 9 (Neb. 2014) (concluding that the rules of evidence do not apply at hearings 
to determine preliminary questions of admissibility including suppression hearings); State v. 
McRae, 351 P.3d 797, 799 (Or. Ct. App. 2015) (“A hearing on a motion to suppress evidence in a 
criminal case is a hearing involving a preliminary question concerning evidence . . . and is not 
governed by the rules of evidence.”); State v. Woinarowicz, 720 N.W.2d 635, 641 (N.D. 2006) 
(“The district court is not bound by the rules of evidence at a suppression hearing . . . .”); Matoumba 
v. State, 890 A.2d 288, 293 (Md. 2006) (“Because the common-law rules of evidence did not apply 
to suppression proceedings before adoption of the Maryland Rules of Evidence, it follows that, 
pursuant to Md. Rule 5-101 (b)(12) [excusing strict application in proceedings which, “prior to the 
adoption of the rules . . . , the court was traditionally not bound by the common-law rules of 
evidence”], the Rules now in effect are inapplicable to suppression hearings.”).  We note that 
Houston cites State v. Schwetz, 1986 WL 3671, at *3 (Ohio Ct. App. Mar. 14, 1986) for the 
proposition that it is inappropriate to relax the rules of evidence at suppression hearings.  But we 
also note that a later opinion from the Ohio Court of Appeals was highly critical of Schwetz, listing 
“several reasons . . . [why] the Schwetz opinion enjoys very limited precedential value.”  State v. 
Moss, 1996 WL 130982, at *5 n.8 (Ohio Ct. App. Mar. 15, 1996). 
24 
 
where the reasonableness of a police officer’s suspicion is at issue, “the rules of 
evidence normally applicable in criminal trials do not operate with full force.”64  The 
extent to which the rules of evidence should be relaxed in these circumstances is 
committed to the sound discretion of the trial court subject to the considerations we 
discuss below. 
E. 
 
“A determination of reasonable suspicion must be evaluated in the context of 
the totality of the circumstances as viewed through the eyes of a reasonable, trained 
police officer in the same or similar circumstances, combining objective facts with 
such an officer’s subjective interpretation of those facts.”65  Indeed, it is now well 
settled that, when determining whether a police officer has the requisite level of 
suspicion to justify a detention or arrest, the expertise and experience of the officer 
are to be taken into account.66  Hence, a trained and experienced police officer can 
develop a justifiable suspicion when an untrained lay person might not.  This 
frequently comes into play when an officer relies upon his sense of smell in 
suspecting that an illegal substance is present.67 
 
64 Matlock, 415 U.S. at 172. 
65 Jones v. State, 745 A.2d 856, 861 (Del. 1999) (footnote omitted). 
66 2 Wayne R. LaFave, Search & Seizure: A Treatise on the Fourth Amendment § 3.2 (6th ed. 
2020). 
67 See, e.g., Hall v. State, 981 A.2d 1106, 1113 (Del. 2009) (holding that the police had a reasonable 
articulable suspicion to detain the defendant based on the officer’s detection of “an overwhelming 
odor of PCP” coming from a car in which the defendant was sitting). 
25 
 
 
In Johnson v. United States, the United States Supreme Court rejected the 
defendant’s contention that odors cannot be evidence sufficient to constitute 
probable cause for a search: 
If the presence of odors is testified to before a magistrate and he finds 
the affiant qualified to know the odor, and it is one sufficiently 
distinctive to identify a forbidden substance, this Court has never held 
such a basis insufficient to justify issuance of a search warrant.  Indeed 
it might very well be found to be evidence of the most persuasive 
character.68 
Whether an officer is “qualified to know the odor” is to be determined on a case-by-
case basis,69 not under the gatekeeping scrutiny mandated by Daubert, but just as 
any other observation by the officer would be considered under the totality-of-the 
circumstances test.  As we noted in State v. Murray, “[w]hen an officer testifies 
about something he has learned . . . through his police experience, . . . a court cannot 
expect the testimony to be supported by a statistical analysis or a scientific study.”70  
Rather, “commonsense judgments and inferences about human behavior”71 should 
guide the court. 
 
In this case, the Superior Court justified its consideration of Detective 
Radcliffe’s testimony about the chemical odor by classifying the inference the 
detective drew from that odor as an admissible lay opinion under D.R.E. 701.  But 
 
68 Johnson v. United States, 333 U.S. 10, 13 (1948). 
69 LaFave, supra note 66, § 3.6. 
70 State v. Murray, 213 A.2d 571, 580 (Del. 2019) (footnote omitted). 
71 Id. (quoting Illinois v. Wardlow, 528 U.S. 119, 125 (2000)). 
26 
 
as mentioned above, we do not believe that the admissibility of the testimony turns 
on whether it falls neatly within D.R.E. 701’s qualifications.  Thus, we need not 
determine whether Detective Radcliffe’s reliance on specialized training and 
experience transformed his suspicion that what he smelled as an indication—but not 
proof—of the presence of cocaine from an ordinary use of his sense of smell into the 
formation of an expert opinion.  Instead, we review the trial judge’s determination 
that the challenged testimony was sufficiently reliable and relevant to his 
determination of reasonable suspicion for an abuse of discretion.  And given 
Detective Radcliffe’s wealth of experience, which brought him into contact with 
cocaine on “[h]undreds if not thousands”72 of occasions, and his ability to relate the 
chemical odor that he smelled when Houston opened his window to the presence of 
cocaine, we conclude that the Superior Court exercised its discretion soundly when 
it considered the challenged testimony. 
VI. 
 
Accordingly, the judgment of the Superior Court is affirmed. 
 
72 App. to Opening Br. at A92.