Two years later, an answer began to emerge. In the summer of 2014, Chief Justice John Roberts wrote an opinion for a unanimous Supreme Court.16 The justices decided that the police needed a warrant to search someone’s cell phone, even if the person was under arrest for committing a crime. As Roberts put it, “Modern cell phones are not just another technological convenience. With all they contain and all they may reveal, they hold for many Americans the privacies of life.”
