Graham v. United States

Issue: (1) Whether the Fourth Amendment requires law enforcement to obtain a warrant to acquire cell-site location information used to track and reconstruct the location and movements of cell-phone users over extended periods of time; and (2) whether 18 U.S.C. § 2703, which contains both a provision that requires the government to seek a warrant in order to obtain stored location information from cellular-service providers, as well as a provision allowing law enforcement to obtain this data on less than probable cause, supports application of the good-faith exception to law enforcement's acquisition of over seven months of cell-site location information without a warrant.