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  2. Reasonable expectation of privacy (United States) - Wikipedia

    en.wikipedia.org/wiki/Reasonable_expectation_of...

    The reasonable expectation of privacy is crucial in distinguishing a legitimate, reasonable police search and seizure from an unreasonable one. A "search" occurs for purposes of the Fourth Amendment when the Government violates a person's "reasonable expectation of privacy". [3] In Katz v.

  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. Ohio v. Robinette - Wikipedia

    en.wikipedia.org/wiki/Ohio_v._Robinette

    Chief Justice William Rehnquist, writing for the majority, stated that "The touchstone of the Fourth Amendment is reasonableness," and reasonableness is measured by examining the totality of the circumstances. This kind of fact-specific inquiry does not accommodate bright-line rules, as the Court has repeatedly held. In fact, in Schneckloth v.

  5. 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 Fourth Amendment to the U.S. Constitution.

  6. Expectation of privacy (United States) - Wikipedia

    en.wikipedia.org/wiki/Expectation_of_privacy...

    A "search" occurs for purposes of the Fourth Amendment when the Government violates a person's "reasonable expectation of privacy". [3] In Katz v. United States , 389 U.S. 347 (1967) Justice Harlan issued a concurring opinion articulating the two-prong test later adopted by the U.S. Supreme Court as the test for determining whether a police or ...

  7. Wilson v. Arkansas - Wikipedia

    en.wikipedia.org/wiki/Wilson_v._Arkansas

    Wilson v. Arkansas, 514 U.S. 927 (1995), is a United States Supreme Court decision in which the Court held that the traditional, common-law-derived "knock and announce" rule for executing search warrants must be incorporated into the "reasonableness" analysis of whether the actual execution of the warrant is/was justified under the 4th Amendment.

  8. Good-faith exception - Wikipedia

    en.wikipedia.org/wiki/Good-faith_exception

    Ohio that the exclusionary rule also applies to state criminal prosecutions under the doctrine of incorporation. In Mapp, the majority gave three rationales for enforcing the exclusionary rule under the Constitution: protecting a defendant's Fourth Amendment rights, promoting judicial integrity, and deterring improper searches and seizures. [4]

  9. Kentucky v. King - Wikipedia

    en.wikipedia.org/wiki/Kentucky_v._King

    The Fourth Amendment requires searches and seizures be reasonable. The Court has held a search or seizure without a warrant presumptively unreasonable. However, there are many exceptions to the warrant requirement, including exigent circumstances, search incident to arrest, consent search, plain view, automobile exception, and border search exception.