United States Supreme Court
The First Amendment protects a radio commentator who broadcasts an illegally intercepted phone call relating to a matter of public concern, if the broadcaster did not participate in the interception.
Bartnicki v. Vopper held that the First Amendment shields a radio station from liability for broadcasting a newsworthy conversation that was illegally wiretapped and provided to the station by an unknown source, balancing privacy interests against the public's interest in speech about public concerns.