From The Hill:
The Supreme Court ruled 6-3 on Tuesday that the Constitution forbids police from holding a suspect without probable cause, even for fewer than 10 extra minutes.
Writing on behalf of the court, Justice Ruth Bader Ginsburg declared that the constitutional protections against unreasonable search and seizure prevent police from extending an otherwise completed traffic stop to allow for a drug-sniffing dog to arrive.
“We hold that a police stop exceeding the time needed to handle the matter for which the stop was made violates the Constitution’s shield against unreasonable seizures,” she ruled.
The case, Rodriguez v. United States, was brought by a man who was pulled over for driving on the shoulder of a Nebraska highway. After the police pulled him over, checked his license and issued a warning for his erratic driving, the officer asked whether he could walk his drug-sniffing dog around the vehicle.
The driver, Dennys Rodriguez, refused. However, the officer nonetheless detained him for “seven or eight minutes” until a backup officer arrived. Then, the original officer retrieved his dog.
After sniffing around the car, the dog detected drugs, and Rodriguez was indicted for possessing methamphetamine. In all, the stop lasted less than 30 minutes.