283 F. Supp. 3d 1115
D. Utah2017Background
- Trooper Tripodi stopped a California-plated pickup on I-80 after observing a lane change he believed lacked a two-second signal; he followed closely and accelerated before the alleged violation.
- During the stop Tripodi told the driver he would not issue a citation but said he would document the stop, asked routine questions, and requested a backup/narcotics handler.
- Trooper Loveland arrived with Drago, a POST-certified narcotics dog, performed a ~2-minute exterior sniff, and signaled that Drago "indicated" at the tailgate though Drago did not give his full trained sit response.
- Officers searched the tailgate and found ~2 pounds of methamphetamine; both occupants were arrested and indicted for possession with intent to distribute.
- Defendants moved to suppress; at an evidentiary hearing defense expert Dr. Lawrence Myers challenged POST training (lack of double-blind/randomized testing) and opined Drago’s behavior was unreliable, while government witnesses defended POST and that non-final behaviors may show an alert.
- The court suppressed the evidence, holding (1) the stop was provoked by officer conduct, (2) the stop was unlawfully prolonged without reasonable suspicion, and (3) the canine indication was too subjective/unreliable to establish probable cause.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Validity of traffic stop (was violation provoked?) | Tripodi's rapid approach and driving contributed to/caused the lane-change violation, so the stop was not valid at inception. | Observed failure to signal justified the stop; officer speed/positioning not tailgating or wrongful. | Stop invalid: officer conduct provoked the violation, removing the minimal objective justification for the stop. |
| Prolongation of stop / reasonable suspicion to detain further | Tripodi shifted to investigation (urging driver to his car, calling for Triple I/computer criminal-history check, requesting canine) without particularized reasonable suspicion. | Routine checks/documentation and waiting for backup are ordinary; total duration fell within typical stop time. | Stop unreasonably prolonged: timing and content of unrelated investigations (notably Triple I) lacked objective reasonable suspicion. |
| Reliability of canine sniff / probable cause to search | Drago did not give final trained response; POST training lacks double-blind/randomized safeguards; handler subjectivity caused unreliable indication. | Drago is POST-certified; handlers can identify multiple reliable alert behaviors short of the final sit; certification supports reliability. | Canine indication insufficient: performance was too subjective and unreliable here to supply probable cause. |
| Exclusion / good-faith exception | Evidence should be suppressed because stop/search violated Fourth Amendment and canine unreliability undermines probable cause. | Officers acted in good faith relying on a certified dog and training program. | Suppression granted; good-faith exception rejected as inapplicable where canine reliability/illegal detention undermine justification. |
Key Cases Cited
- Whren v. United States, 517 U.S. 806 (officer's subjective intent irrelevant; objective basis governs Fourth Amendment analysis)
- Terry v. Ohio, 392 U.S. 1 (framework for investigative stops)
- Rodriguez v. United States, 575 U.S. 348 (traffic-stop mission; dog sniff may not prolong stop absent reasonable suspicion)
- Illinois v. Caballes, 543 U.S. 405 (dog sniff during lawful stop does not implicate Fourth Amendment if it does not extend the stop)
- Florida v. Harris, 568 U.S. 237 (canine alert may establish probable cause where dog is reliable)
- Vasquez v. Lewis, 834 F.3d 1132 (10th Cir.) (out-of-state plates cannot alone support reasonable suspicion)
- United States v. Ludwig, 641 F.3d 1243 (10th Cir.) (canine certification often suffices but reliability may be challenged)
- United States v. Parada, 577 F.3d 1275 (10th Cir.) (dog "alert" can supply probable cause but reliability matters)
- United States v. Winder, 557 F.3d 1129 (10th Cir.) (traffic-stop legality principles)
- United States v. Sigmond-Ballesteros, 285 F.3d 1117 (9th Cir.) (officer conduct can create driver reactions that negate reasonable suspicion)