Olmstead v. United States

Olmstead v. United States (1928) was a Supreme Court case that addressed whether wiretapped private conversations, obtained without a warrant and used as evidence, could be used in court. The Court ruled that these recordings did not violate the Fourth Amendment because they were not obtained through physical intrusion into a person's property. This decision established that wiretapping without a warrant was permissible at the time. However, later rulings, like Katz v. United States (1967), shifted the understanding of privacy, emphasizing that individuals have a reasonable expectation of privacy even without physical intrusion.