The U.S. Supreme Court has ruled police must obtain a search warrant in order to track a suspect’s movements with GPS. On Monday, the Supreme Court ruled for the first time that police monitoring through attaching a GPS to a suspect’s vehicle is a constitutionally protected search. The ruling marked a defeat for the Obama administration, which had fought to overturn an appeals court ruling that warrants are required. In a statement, the American Civil Liberties Union called the decision “an important victory for privacy,” adding: “The Court acknowledged that advancing technology, like cell phone tracking, gives the government unprecedented ability to collect, store and analyze an enormous amount of information about our private lives.”