United States v. Stephen Cox, 992 F.3d 706

Background

On April 17, 2019, Arkansas State Trooper Christopher Short observed a white SUV accelerate and closely approach a black pickup such that the SUV had to brake suddenly when the pickup exited; Trooper Short stopped the SUV (a rental) driven by Scott Green with Stephen Cox in the passenger seat.
Trooper Short told Green he was following "a little bit close," said he did not intend to issue a ticket, but requested identification and the rental agreement; Green said they were in fugitive recovery.
Trooper Short radioed dispatch for criminal-history checks; Green said they planned a three-day trip to Virginia while Cox gave inconsistent answers (one-day trip, could not name the fugitive).
Dispatch reported Cox had a prior DUI and a drug charge; both men appeared nervous. Trooper Short asked whether he could search the vehicle; Green twice replied "I don't care" and later signed the rental paperwork.
Trooper Short told Cox that Green had consented and asked Cox to step out; Cox did not object, and Trooper Short discovered 17 kilograms of cocaine during the search.
Cox entered a conditional guilty plea but appealed the denial of his motion to suppress; the Eighth Circuit affirmed.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Probable cause to stop for following-too-closely	Cox: Officer lacked probable cause because he did not consider each statutory element and the violation wasn’t proved	Gov: Officer’s dash-cam-supported observation gave an objectively reasonable basis to believe the statute was violated	Stop was supported; officer could reasonably conclude vehicle followed too closely
Whether Green was not at fault for the alleged violation	Cox: Green couldn’t slow or change lanes because pickup forced the braking, so no violation	Gov: Road sign and officer’s movements showed Green could have slowed; nothing prevented him from maintaining distance	Court found Green could have slowed; alternative argument rejected
Whether the stop was unlawfully prolonged after officer said he wouldn’t issue a ticket	Cox: Officer prolonged the seizure by continuing inquiries after saying no ticket would be issued	Gov: Officer performed routine tasks (ID/criminal-history checks, questioning re: destination) and developed suspicions that justified expanded inquiry	Questions and checks were routine; circumstances (nervousness, inconsistent answers) gave reasonable suspicion to expand the stop
Validity of the vehicle search given Green’s consent and Cox’s presence (Randolph)	Cox: As the renter/passenger he had a privacy interest and Green’s consent cannot waive his express refusal (relying on Randolph)	Gov: Green (driver) validly consented; Cox did not object when informed and remained silent, so consent was valid as to Cox	Search was consensual as to Cox: driver’s consent was valid and Cox did not object when told, so Randolph did not save Cox here

Key Cases Cited

Whren v. United States, 517 U.S. 806 (U.S. 1996) (traffic stop is a seizure judged by Fourth Amendment reasonableness)
Rodriguez v. United States, 575 U.S. 348 (U.S. 2015) (seizure justified by traffic violation may not be prolonged beyond mission)
United States v. Martin, 411 F.3d 998 (8th Cir. 2005) (objective-reasonableness standard for whether officer could form suspicion of a code violation)
United States v. Beck, 140 F.3d 1129 (8th Cir. 1998) (observation of following too closely can provide probable cause to stop)
United States v. Murillo-Salgado, 854 F.3d 407 (8th Cir. 2017) (routine traffic-stop tasks may justify further investigation when they produce additional suspicion)
United States v. Eldridge, 984 F.2d 943 (8th Cir. 1993) (driver may consent to a vehicle search that is effective against a silent passenger)
Georgia v. Randolph, 547 U.S. 103 (U.S. 2006) (co-occupant’s present refusal can negate another occupant’s consent as to a residence)
United States v. Peralez, 526 F.3d 1115 (8th Cir. 2008) (distinguishing permissible investigatory questioning from unlawful extension of a stop)