Davis v. United States

(1) Whether the warrantless seizure and search of historical cell phone records revealing the location and movements of a cell phone user over the course of 67 days is permitted by the Fourth Amendment; and (2) whether the good-faith exception to the exclusionary rule applies where the search was based on a court order sought by a prosecutor rather than a warrant sought by police, particularly when the governing statute provided the prosecutor with the option to pursue a warrant but the prosecutor ignored it.