Carpenter v. United States — 127 Days of Carrier-Held CSLI Requires a Warrant; the Third-Party Doctrine Does Not Apply

The FBI obtained 127 days of cell-site location data on Carpenter under the Stored Communications Act’s lower “reasonable grounds” standard — no warrant. 12,898 location points were used at trial. The Court held that long-term CSLI requires a warrant and that the third-party doctrine does not extend to comprehensive location records.

U.S. Supreme Court

June 22, 2018