United States v. Leonel Guerrero
665 F.3d 1305
D.C. Cir.2011Background
- Guerrero was convicted by a jury for unlawful possession with intent to distribute cocaine and aiding and abetting.
- He challenged lay opinion testimony under Rule 701 about the drug-trafficking significance of seized bedroom items and whether it required Rule 702 qualification.
- The items seized included two coffee grinders, a scale, a small white ceramic bowl and spoon, creatine, gloves, baggies, and $707 in cash, later found to contain cocaine residue.
- Agent Drewniak testified the seized items were consistent with narcotics distribution and described typical drug-trafficking uses for the items.
- Defense presented that the items may have benign uses; a co-worker and neighbor testified about Guerrero’s poor eyesight and character.
- The district court admitted some lay opinion testimony, excluded certain expert ultimate-issue testimony, and allowed guilt-assuming hypothetical questions of a neighbor witness; Guerrero was sentenced to time served plus supervised release.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether Drewniak’s lay opinion about drug-trafficking significance was properly admitted under Rule 701 | Guerrero argues improper lay opinion, not limited to firsthand perception, and relies on specialized knowledge | Government contends testimony is proper lay opinion and not expert testimony requiring Rule 702 | Assuming error, it did not affect substantial rights or trial outcome |
| Whether the district court abused its discretion by excluding Dr. Feinberg’s ultimate-issue opinion | Guerrero contends exclusion of the ultimate-issue opinion on visual capacity was error | Court properly limited expert to non-ultimate issues and allowed relevant testimony | No abuse of discretion; defense had alternative testimony addressing visual limitations |
| Whether the prosecutor’s guilt-assuming hypothetical questions to a neighbor witness were improper | Guerrero argues cross-examination violated Rule 405 and improperly assumed guilt | Questions were permissible or at least not plain error since neighbor gave personal opinion | No plain error or abuse; not reversible error |
Key Cases Cited
- United States v. Boney, 977 F.2d 624 (D.C. Cir. 1992) (expert testimony permitted for narcotics operations not within common knowledge)
- United States v. Dunn, 846 F.2d 761 (D.C. Cir. 1988) (drug-dealing operations as expert topic; limits on lay opinion)
- United States v. Wilson, 605 F.3d 985 (D.C. Cir. 2010) (clarified when lay testimony may rely on specialized knowledge under 701/702)
- United States v. Smith, 640 F.3d 358 (D.C. Cir. 2011) (affirmed need for expert qualification for typical drug-trafficking operation testimony)
- United States v. White, 887 F.2d 267 (D.C. Cir. 1989) (cross-examination on guilt-focused hypotheticals; opinion testimony distinguished)
- United States v. Kellogg, 510 F.3d 188 (3d Cir. 2007) (distinguishing opinion testimony from guilt-assuming hypotheticals)
- United States v. Ramsey, 165 F.3d 980 (D.C. Cir. 1999) (plain-error review standard for evidentiary errors)
- United States v. Salamanca, 990 F.2d 629 (D.C. Cir. 1993) (restriction on ultimate-issue testimony by psychologists)