Justice Antonin Scalia

In a rare victory for fans of the Fourth Amendment, the Supreme Court unanimously decided today that the police need to have a search warrant before they can place a GPS device on your car to track your movements, even if your car is parked on public property when the device is attached. Surprisingly, even though the case in question involved a cocaine trafficker alleged to have moved 97 kilos and $850,000, the justices decided the Obama Administration’s position was wrong.