United States v. Mario Smith, 789 F.3d 923

Background

Late-night traffic stop of a Dodge Charger after speeding; driver presented a Minnesota license identifying him as Mario Ronrico Smith. Officer detected a faint/"slight" odor of marijuana and requested consent to search; Smith refused.
Officer called for backup and a K-9 unit; while waiting (about 11–17 minutes after stop), Smith fled in the Charger and led officers on a high-speed chase, abandoned the vehicle after a PIT maneuver, and escaped on foot. Officers retained Smith’s driver’s license.
Warrant search of the towed Charger uncovered two ~1 kg cocaine bricks, $6,000 cash, a Glock .40 with ammunition, prescription bottles and a wallet in Smith’s name, three cell phones (one assigned to Smith), and a partially consumed soda bottle later matched to Smith by DNA; gun DNA could not exclude Smith.
Smith was on supervised release from a 2002 cocaine-distribution conviction; his probation officer testified about contact and supervised-release violations around the time of the stop.
Procedural posture: Smith convicted by jury on possession with intent to distribute, 18 U.S.C. § 924(c) firearms charge, and § 922(g) felon-in-possession. District court denied motions to suppress, exclude prior conviction, exclude expert testimony, and for acquittal/new trial; this appeal followed.

Issues

Issue	Smith’s Argument	Government’s Argument	Held
1) Whether officer had reasonable suspicion / probable cause to expand/detain and search after smelling faint marijuana	The "very faint" marijuana odor was an inadequate hunch to prolong the stop or justify further investigation/search.	The odor of marijuana (officer trained to detect it), plus officer experience and subsequent investigative steps (call for K-9), gave reasonable, articulable suspicion and probable cause to justify the expanded intrusion.	Court upheld detention/search: credited officer’s training and detection; odor supported probable cause; denial of suppression affirmed.
2) Whether abandonment/chase made later search lawful independent of the initial detention	Evidence should be suppressed because the stop was unlawfully prolonged.	Smith’s flight, high-speed chase, and abandonment of the Charger relinquished any Fourth Amendment protection; subsequent search was lawful.	Court affirmed: abandonment and flight provided independent grounds making the later search admissible.
3) Admissibility of 2002 drug conviction under Rule 404(b)	Prior conviction is prejudicial propensity evidence and merely proves guilt here.	Prior conviction is admissible to show intent/knowledge (general-denial defense places state of mind at issue); not overly remote and probative value outweighs prejudice; limiting instruction given.	Court affirmed admission: prior conviction relevant to intent/knowledge, sufficiently similar and not overly remote; limiting instruction mitigated prejudice.
4) Admissibility of police expert testimony on drug trafficking under Rule 702	Expert testimony was cumulative/irrelevant and should be excluded.	Experienced narcotics detective may provide relevant, reliable context on packaging, quantities, and firearms use in trafficking to assist jury.	Court affirmed: district court did not abuse discretion; expert testimony reliable and helpful.
5) Sufficiency of evidence / identification of driver	Officer’s limited description and rookie status undermine identification; physical evidence doesn’t tie Smith to driver.	Officer retained license, had 1.5–3 minutes of face-to-face contact, matched work/place info; multiple items in car linked to Smith (pills, wallet, phone, DNA).	Court affirmed convictions: viewed evidence in light most favorable to verdict; jury reasonably identified Smith as the driver and found guilt beyond a reasonable doubt.

Key Cases Cited

Terry v. Ohio, 392 U.S. 1 (1968) (standard for investigative stops and reasonable suspicion)
United States v. Sokolow, 490 U.S. 1 (1989) (reasonable suspicion must be supported by articulable facts)
United States v. Arvizu, 534 U.S. 266 (2002) (courts may credit officers’ training/experience in assessing totality of circumstances)
United States v. Caves, 890 F.2d 87 (8th Cir. 1989) (odor of illegal drug is highly probative for searches)
United States v. Barry, 394 F.3d 1070 (8th Cir. 2005) (marijuana odor during a traffic stop can support detention/search)
United States v. Portmann, 207 F.3d 1032 (8th Cir. 2000) (upholding searches where prolonged stop was justified)
United States v. Smith, 648 F.3d 654 (8th Cir. 2011) (abandoned property doctrine—no Fourth Amendment protection)
United States v. Trogdon, 575 F.3d 762 (8th Cir. 2009) (Rule 404(b) framework: permissible non-propensity uses)
United States v. Williams, 534 F.3d 980 (8th Cir. 2008) (factors for admitting prior bad acts evidence)
United States v. Robertson, 387 F.3d 702 (8th Cir. 2004) (district court’s gatekeeping role for expert testimony under Rule 702)
United States v. Taylor, 462 F.3d 1023 (8th Cir. 2006) (upholding narcotics expert testimony explaining trafficking indicators)
United States v. Trotter, 721 F.3d 501 (8th Cir. 2013) (standard of review for sufficiency of the evidence)