Whren v. United States
Headline: Court upholds traffic stops based on observed violations even if officers had other motives, allowing police to detain motorists suspected of traffic offenses and admit evidence found during those stops.
Holding:
- Allows police to stop motorists for observed traffic violations even if officers had other investigatory motives.
- Admits evidence found during such stops into criminal prosecutions.
- Racially selective stops must be challenged under equal protection, not the Fourth Amendment.
Summary
Background
Plainclothes vice-squad officers in an unmarked car saw a dark Pathfinder truck with temporary plates stopped at a sign, waited more than twenty seconds, then turn without signaling and speed away. The officers followed, stopped the truck at a red light, and an officer approached the driver, ordered the car to park, and immediately saw what looked like large bags of crack cocaine. The driver and passenger were arrested and charged. They argued the stop was only a pretext to investigate drugs and moved to suppress the evidence.
Reasoning
The Court addressed whether a stop is unreasonable under the Fourth Amendment when officers had probable cause to believe a traffic law was broken but may have had other investigative motives. Relying on prior decisions, the Court held that objective probable cause to believe a traffic violation occurred makes a brief stop reasonable, even if the officer privately harbored another motive. The opinion rejected a rule that would require courts to probe the officer’s actual intent or the usual practices of local police departments before upholding a stop.
Real world impact
The Court affirmed the convictions and allowed the evidence seized after the traffic stop to be used at trial. Going forward, police with observed traffic violations can make brief stops even when they are investigating other crimes, and challenges based on discriminatory or selective enforcement must proceed under equal protection rules rather than by claiming the stop violated the Fourth Amendment.
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