The Supreme Court unanimously ruled that police need a warrant before they can search the cellphone of a person he arrested. Chief Justice John Roberts wrote that cellphones are now such a pervasive and insistent part of daily life that the proverbial visitor from Mars might conclude they were an important feature of human anatomy. The decision boiled down to telling cops to get a warrant first, but the police can still search phones without a warrant if there are exigent circumstances such as imminent danger to life or the possibility that evidence would be destroyed.”]