If you had asked a legal scholar yesterday, they would have told you the Fourth Amendment was in trouble. Historically, its been the main force protecting your privacy — its the reason police need a warrant to search your home, and cant arrest you without a charge — but a lot of those rights havent survived the shift to digital media. For privacy advocates, its the best news in a long time In a historic 9–0 decision on Riley v. California, the Supreme Court offered one of the most stirring defenses of the Fourth Amendment in years.