U.S. Supreme Court Ruling Limits Police Authority During Traffic Stops
A recent ruling by the U.S. Supreme Court, Rodriguez v. United States, establishes limits on police authority during traffic stops. The court ruled that an officer’s authority over the driver ends once the officer accomplishes the “mission” of the traffic stop, which in this specific case involved writing a warning ticket for a minor traffic violation. Anything that occurs after the “mission” is complete violates the Fourth Amendment prohibition on unreasonable searches and seizures. Since many DWI cases begin with a traffic stop for a minor infraction, this ruling could have a significant impact. At the same time, it still allows police to conduct further investigations, such as field sobriety testing, if they can show probable cause to suspect DWI.
A police officer pulled the defendant over for driving on the shoulder of a highway. He questioned the defendant and his passenger, ran a criminal check on the defendant’s license, and issued a warning ticket. While he acknowledged that he had completed the purpose of the stop, he did not let the defendant go. Instead, he ordered the defendant and the passenger out of the vehicle and made two passes with a drug-sniffing dog. On the second pass, the dog alerted to something in the vehicle, which turned out to be methamphetamine.
The drug-sniff search prolonged the traffic stop for an additional seven or eight minutes after the officer wrote the ticket. The defendant moved to suppress the evidence from the search of his vehicle, arguing that the officer lacked probable cause. The trial court denied the motion, finding that, while the officer lacked probable cause to search for drugs, the seven- or eight-minute extension of the stop was a minimal intrusion on the defendant’s rights and was therefore permissible. The court of appeals affirmed this ruling.
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