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  2. 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 ...

  3. Johnson v. United States (1948 Fourth Amendment case)

    en.wikipedia.org/wiki/Johnson_v._United_States...

    Johnson v. United States, 333 U.S. 10 (1948), was a significant United States Supreme Court decision addressing search warrants and the Fourth Amendment.In this case, where federal agents had probable cause to search a hotel room but did not obtain a warrant, the Court declared the search was "unreasonable."

  4. Warrantless searches in the United States - Wikipedia

    en.wikipedia.org/wiki/Warrantless_searches_in...

    Warrantless searches are searches and seizures conducted without court-issued search warrants.. In the United States, warrantless searches are restricted under the Fourth Amendment to the United States Constitution, part of the Bill of Rights, which states, "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not ...

  5. United States v. Grubbs - Wikipedia

    en.wikipedia.org/wiki/United_States_v._Grubbs

    The defendant had argued that anticipatory warrants in general violated the Fourth Amendment's requirement that "no Warrants shall issue, but upon probable cause," because the anticipated probable cause does not exist at the time of the warrant's issuance. The Court first noted that the courts of appeals had unanimously rejected this argument ...

  6. Devenpeck v. Alford - Wikipedia

    en.wikipedia.org/wiki/Devenpeck_v._Alford

    Devenpeck v. Alford, 543 U.S. 146 (2004), was a United States Supreme Court decision dealing with warrantless arrests and the Fourth Amendment.The Court ruled that even if an officer wrongly arrests a suspect for one crime, the arrest may still be "reasonable" if there is objectively probable cause to believe that the suspect is involved in a different crime.

  7. United States v. Leon - Wikipedia

    en.wikipedia.org/wiki/United_States_v._Leon

    An officer acting in good faith and within the scope of a search warrant should not be subjected to Fourth Amendment constitutional violations. It is the magistrate’s or judge’s responsibility to ascertain whether the warrant is supported by sufficient information to support probable cause.

  8. Steagald v. United States - Wikipedia

    en.wikipedia.org/wiki/Steagald_v._United_States

    Steagald v. United States, 451 U.S. 204 (1981), is a United States Supreme Court case which held that, based on the Fourth Amendment, a police officer may not conduct a warrantless search of a third party's home in an attempt to apprehend the subject of an arrest warrant, absent consent or exigent circumstances.

  9. Arizona v. Gant - Wikipedia

    en.wikipedia.org/wiki/Arizona_v._Gant

    Arizona v. Gant, 556 U.S. 332 (2009), was a United States Supreme Court decision holding that the Fourth Amendment to the United States Constitution requires law-enforcement officers to demonstrate an actual and continuing threat to their safety posed by an arrestee, or a need to preserve evidence related to the crime of arrest from tampering by the arrestee, in order to justify a warrantless ...