159 F.4th 550
9th Cir.2025Background
- Triston Harris Steinman was stopped by a Nevada State Trooper (Boyer) for speeding. During the stop, Trooper Boyer observed an ammunition box in Steinman's car and learned that Steinman was a convicted felon.
- Steinman admitted to having ammunition in the car but denied possessing firearms. Trooper Boyer ran a criminal history check and questioned Steinman further.
- After confirming Steinman's felony status and observing other suspicious factors, Boyer eventually seized the car and, later, on a warrant, searched it, recovering firearms and ammunition.
- Steinman moved to suppress the evidence, arguing Fourth Amendment violations due to prolongation of the stop, lack of probable cause, and warrant overbreadth.
- The district court agreed with Steinman, suppressed the evidence, and the government appealed.
- The Ninth Circuit reviewed the suppression order de novo, reversed the district court, and upheld the search/seizure under the automobile exception.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Prolongation of Traffic Stop | Stop was not impermissibly prolonged | Stop was unreasonably prolonged for investigatory purposes | Stop was not unlawfully prolonged; Trooper Boyer acted within mission |
| Probable Cause to Seize Automobile | Trooper had probable cause under federal and state law | No probable cause; seizure for federal-only offense not allowed | Probable cause existed for both federal ammunition and Nevada firearm law |
| "Cross-Enforcement" Authority | State officer can seize for federal crimes absent prohibition | State officer can't seize for conduct only criminal under federal law | State officer can seize for federal crimes if not barred by state law |
| Effect of Overbroad Search Warrant | Warrant defects immaterial due to valid exception | Overbroad warrant alone justifies suppression | Suppression not required if search valid under automobile exception |
Key Cases Cited
- Rodriguez v. United States, 575 U.S. 348 (traffic stop must not be prolonged beyond what is necessary for its mission)
- Pennsylvania v. Mimms, 434 U.S. 106 (officers may order drivers out for safety during traffic stops)
- Virginia v. Moore, 553 U.S. 164 (Fourth Amendment reasonableness doesn't depend on state law)
- California v. Acevedo, 500 U.S. 565 (automobile exception to warrant requirement for probable cause)
- Chambers v. Maroney, 399 U.S. 42 (warrantless vehicle search allowed if probable cause exists)
- Atwater v. City of Lago Vista, 532 U.S. 318 (arrest for minor offenses is valid if probable cause exists)