389 U.S. 347 (1967)
Facts: In suspicion Katz was sending gambling information to individuals in other states over the phone, Federal agents attached a device to an outside public phone booth to eavesdrop on Katz. The recording revealed Katz was convicted of eight-counts indictment for transmitting illegal wager information from Los Angeles to Boston and Miami. Katz appealed his conviction stating that the recordings could not be used as evidence against him. However, the Court of Appeals rejected his point stating the absence of a physical intrusion into the phone booth rejected his challenge. Therefore, the Court granted certiorari.
Issue: Does the Fourth Amendment protect against unreasonable searches and seizures that