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  2. Katz v. United States - Wikipedia

    en.wikipedia.org/wiki/Katz_v._United_States

    Katz v. United States, 389 U.S. 347 (1967), was a landmark decision of the U.S. Supreme Court in which the Court redefined what constitutes a "search" or "seizure" with regard to the protections of the Fourth Amendment to the U.S. Constitution. [1] The ruling expanded the Fourth Amendment's protections from an individual's "persons, houses ...

  3. Fourth Amendment to the United States Constitution - Wikipedia

    en.wikipedia.org/wiki/Fourth_Amendment_to_the...

    The Bill of Rights in the National Archives. The Fourth Amendment (Amendment IV) to the United States Constitution is part of the Bill of Rights.It prohibits unreasonable searches and seizures and sets requirements for issuing warrants: warrants must be issued by a judge or magistrate, justified by probable cause, supported by oath or affirmation, and must particularly describe the place to be ...

  4. Olmstead v. United States - Wikipedia

    en.wikipedia.org/wiki/Olmstead_v._United_States

    Olmstead v. United States, 277 U.S. 438 (1928), was a decision of the Supreme Court of the United States, on the matter of whether wiretapping of private telephone conversations, conducted by federal agents without a search warrant with recordings subsequently used as evidence, constituted a violation of the target’s rights under the Fourth and Fifth Amendments.

  5. Vernonia School District 47J v. Acton - Wikipedia

    en.wikipedia.org/wiki/Vernonia_School_District...

    The Fourth Amendment only protects against intrusions upon legitimate expectations of privacy. Central to the Court's analysis, in this case, was the fact that the "subjects of the policy are (1) children, who (2) have been committed to the temporary custody of the State as a schoolmaster."

  6. Carpenter v. United States - Wikipedia

    en.wikipedia.org/wiki/Carpenter_v._United_States

    Carpenter v. United States, 585 U.S. 296 (2018), is a landmark United States Supreme Court case concerning the privacy of historical cell site location information (CSLI). The Court held that the government violates the Fourth Amendment to the United States Constitution when it accesses historical CSLI records containing the physical locations of cellphones without a search warrant.

  7. Mapp v. Ohio - Wikipedia

    en.wikipedia.org/wiki/Mapp_v._Ohio

    Mapp v. Ohio, 367 U.S. 643 (1961), was a landmark U.S. Supreme Court decision in which the Court ruled that the exclusionary rule, which prevents a prosecutor from using evidence that was obtained by violating the Fourth Amendment to the U.S. Constitution, applies to states as well as the federal government. The Supreme Court accomplished this ...

  8. Riley v. California - Wikipedia

    en.wikipedia.org/wiki/Riley_v._California

    People v. Diaz (2011) Riley v. California, 573 U.S. 373 (2014), [1] is a landmark United States Supreme Court case in which the court ruled that the warrantless search and seizure of the digital contents of a cell phone during an arrest is unconstitutional under the Fourth Amendment. [2][3] The case arose from inconsistent rulings on cell phone ...

  9. Kyllo v. United States - Wikipedia

    en.wikipedia.org/wiki/Kyllo_v._United_States

    Kyllo v. United States, 533 U.S. 27 (2001), was a decision by the Supreme Court of the United States in which the court ruled that the use of thermal imaging devices to monitor heat radiation in or around a person's home, even if conducted from a public vantage point, is unconstitutional without a search warrant. [1]