The Supreme Court has held that the police cannot attach a GPS (global-positioning system) device to the bumper of a suspect's automobile to track his or her movements for nearly a month without a valid warrant.

Question

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The U.S. Supreme Court ruled in United States v. Jones (2012) that attaching a GPS device to a vehicle and using it to monitor movements constitutes a search under the Fourth Amendment, requiring a valid warrant.

The Supreme Court Has Held That the Police Cannot Attach