The U.S. Supreme Court ruled unanimously Monday that police must get a search warrant before using GPS technology to track criminal suspects.

The ruling represents a serious complication for law enforcement nationwide, which increasingly relies on high tech surveillance of suspects, including the use of various types of satellite technology.

A GPS device installed by police on Washington nightclub owner Antoine Jones' Jeep helped them link him to a suburban house used to stash money and drugs. He was sentenced to life in prison before the appeals court overturned the conviction.

Associate Justice Antonin Scalia said that the government's installation of a GPS device, and its use to monitor the vehicle's movements, constitutes a search, meaning that a warrant is required.