Summary
In Katz v. United States, 389 U.S. 347 (1967), the Supreme Court reversed a conviction based on warrantless recordings from a public phone booth. The Court held that the Fourth Amendment protects people, not places, and that electronic surveillance of a private conversation can be a search even without physical trespass.
Legal Issue
Does the Fourth Amendment apply to government electronic listening and recording of a person's conversations from a public phone booth when officers do not physically trespass into the booth?
Holding
Yes. The Court held that the government's electronic surveillance violated the privacy Katz justifiably relied on while using the phone booth and was a Fourth Amendment search and seizure. Physical trespass is not required. Warrantless electronic surveillance is unconstitutional unless a recognized exception applies.
Rule of Law
The Fourth Amendment protects people, not just places. If a person reasonably expects privacy in a conversation, police usually need a warrant before secretly recording it.
Court Reasoning
Not yet summarized.
Impact for Officers
Katz remains central to disputes over wiretaps, phones, location data, digital monitoring, and surveillance technology. Its reasonable-expectation-of-privacy framework still shapes how courts evaluate searches in both physical and digital settings.
What Officers Can Do
Not yet summarized.
What Officers Should Avoid
Not yet summarized.
Common Misunderstanding
Not yet summarized.