''Nardone v. United States'', 308 U.S. 338 (1939), was a

U.S. Supreme Court The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all U.S. federal court cases, and over state court cases that involve a point o ...

case in which the Court ruled that evidence obtained via warrantless wiretaps, in violation of the

Communications Act of 1934 The Communications Act of 1934 is a United States federal law signed by President Franklin D. Roosevelt on June 19, 1934 and codified as Chapter 5 of Title 47 of the United States Code, et seq. The Act replaced the Federal Radio Commission with ...

, was inadmissible in federal court. The Court ruled that use of evidence directly obtained from

wiretapping Telephone tapping (also wire tapping or wiretapping in American English) is the monitoring of telephone and Internet-based conversations by a third party, often by covert means. The wire tap received its name because, historically, the monitorin ...

, such as the conversations themselves, and indirectly, such as evidence obtained through knowledge gained from wiretapped conversations, was inadmissible in trial court.

References

Evidence case law Surveillance Warrants 1939 in the United States Telephone tapping United States Supreme Court cases United States Supreme Court cases of the Hughes Court United States Fourth Amendment case law {{SCOTUS-stub