Source: http://www.legalthree.com/federal-rules-of-evidence/rule-701-opinion-testimony-by-lay-witnesses/
Timestamp: 2019-04-24 16:31:05+00:00

Document:
Limitation is for lay-witnesses, expert witnesses have more leeway in speculating scientific or technical outcomes.
Rule 701 has been amended to eliminate the risk that the reliability requirements set forth in Rule 702 will be evaded through the simple expedient of proffering an expert in lay witness clothing. Under the amendment, a witness’ testimony must be scrutinized under the rules regulating expert opinion to the extent that the witness is providing testimony based on scientific, technical, or other specialized knowledge within the scope of Rule 702. See generally Asplundh Mfg. Div. v. Benton Harbor Eng’g, 57 F.3d 1190 (3d Cir. 1995). By channeling testimony that is actually expert testimony to Rule 702, the amendment also ensures that a party will not evade the expert witness disclosure requirements set forth in Fed.R.Civ.P. 26 and Fed.R.Crim.P. 16 by simply calling an expert witness in the guise of a layperson. See Joseph, Emerging Expert Issues Under the 1993 Disclosure Amendments to the Federal Rules of Civil Procedure , 164 F.R.D. 97, 108 (1996) (noting that “there is no good reason to allow what is essentially surprise expert testimony,” and that “the Court should be vigilant to preclude manipulative conduct designed to thwart the expert disclosure and discovery process”). See also United States v. Figueroa-Lopez, 125 F.3d 1241, 1246 (9th Cir. 1997) (law enforcement agents testifying that the defendant’s conduct was consistent with that of a drug trafficker could not testify as lay witnesses; to permit such testimony under Rule 701 “subverts the requirements of Federal Rule of Criminal Procedure 16 (a)(1)(E)”).
The amendment is not intended to affect the “prototypical example[s] of the type of evidence contemplated by the adoption of Rule 701 relat[ing] to the appearance of persons or things, identity, the manner of conduct, competency of a person, degrees of light or darkness, sound, size, weight, distance, and an endless number of items that cannot be described factually in words apart from inferences.” Asplundh Mfg. Div. v. Benton Harbor Eng’g, 57 F.3d 1190, 1196 (3d Cir. 1995).
For example, most courts have permitted the owner or officer of a business to testify to the value or projected profits of the business, without the necessity of qualifying the witness as an accountant, appraiser, or similar expert. See, e.g., Lightning Lube, Inc. v. Witco Corp. 4 F.3d 1153 (3d Cir. 1993) (no abuse of discretion in permitting the plaintiff’s owner to give lay opinion testimony as to damages, as it was based on his knowledge and participation in the day-to-day affairs of the business). Such opinion testimony is admitted not because of experience, training or specialized knowledge within the realm of an expert, but because of the particularized knowledge that the witness has by virtue of his or her position in the business. The amendment does not purport to change this analysis. Similarly, courts have permitted lay witnesses to testify that a substance appeared to be a narcotic, so long as a foundation of familiarity with the substance is established. See, e.g., United States v. Westbrook, 896 F.2d 330 (8th Cir. 1990) (two lay witnesses who were heavy amphetamine users were properly permitted to testify that a substance was amphetamine; but it was error to permit another witness to make such an identification where she had no experience with amphetamines). Such testimony is not based on specialized knowledge within the scope of Rule 702, but rather is based upon a layperson’s personal knowledge. If, however, that witness were to describe how a narcotic was manufactured, or to describe the intricate workings of a narcotic distribution network, then the witness would have to qualify as an expert under Rule 702. United States v. Figueroa-Lopez, supra.

References: v. 
 v. 
 v. 
 v. 
 v. 
 v.