Recent Supreme Court Decision: cell phones

Article: The Supreme Court recently had to decide a case regarding cell phone. A man as stopped by police for a minor traffic infraction. When the police pulled him over and searched his car, they found guns. They then searched his cell phone and found pictures that were incriminating (showing guilt of a crime). They arrested him and he went to jail. He appealed, claiming that the search of his cell phone was illegal. (Kids: why? Argue both sides of the case.) The Supreme Court found that the search was illegal and not incident to the arrest, unless it was exigent circumstances (emergency situation), such as terrorism.