Divided Supreme Court Requires Warrants for Cell Phone Location Data
On June 22, 2018, the United States Supreme Court decided Carpenter v. United States, in which it held that the government must generally obtain a search warrant supported by probable cause before acquiring more than seven days of historical cell-site location information (“CSLI”) from a service provider. Noting “the deeply revealing nature of CSLI, its depth, breadth, and comprehensive reach, and the inescapable and automatic nature of its collection,” the Court held that an individual “maintains…