Supreme Court of the United States January 23, 2012, 10-1259 (United States v. Jones)

Justice Alito,

with whom Justice Ginsburg, Justice Breyer, and Justice Kagan join,

concurring in the judgment.

This case requires us to apply the Fourth Amendment’s prohibition of unreasonable searches and seizures to a 21st-­century surveillance technique, the use of a Global Position­ing System (GPS) device to monitor a vehicle’s movements for an extended period of time.