In which case did the court rule that police use of a GPS tracker required a valid warrant?

The ruling in the case of U.S. v. Jones established that the use of a GPS tracker by law enforcement constitutes a search under the Fourth Amendment of the U.S. Constitution. This decision emphasized that placing a GPS device on a vehicle and using it to monitor an individual's movements over a prolonged period requires a warrant supported by probable cause. The court's reasoning highlighted the invasive nature of continuous surveillance and the expectation of privacy that individuals have in their movements. By requiring a warrant, the ruling reinforced the necessity for judicial oversight before the government can intrude upon personal privacy through technological means. This case has important implications for the intersection of technology and privacy rights in law enforcement practices.