United States v. Monia

Summary

The Court affirmed that a witness who appears before a grand jury in response to a subpoena and testifies under oath is entitled to immunity from prosecution under the Sherman Act, even if he does not claim the Fifth Amendment privilege against self‑incrimination. The majority held that the statutory language plainly grants such immunity and that Congress did not intend to condition it on a privilege claim, while the dissent argued that immunity should require a claim of the privilege.