Carpenter v. United States

Decided June 22, 2018. John Glover Roberts Jr. delivered the opinion of the Court.

Docket 16-402 · 585 U.S. 296 · Cited 1,201 times

The Government’s acquisition of Carpenter’s cell-site records from his wireless carriers was a Fourth Amendment search; and the Government did not obtain a warrant supported by probable cause before acquiring those records.

The Court’s statement of the holding, from the opinion’s syllabus. The syllabus is prepared by the Reporter of Decisions and is not part of the opinion of the Court — read the official opinion for authority.

Read the official opinion (PDF, supremecourt.gov) (opens primary source in a new tab)

John Glover Roberts Jr.’s profile · All opinions since October Term 2017 · The Supreme Court

Source: Supreme Court of the United States, slip opinions (2018). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-02. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).