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  2. 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."

  3. 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 ...

  4. New Jersey v. T. L. O. - Wikipedia

    en.wikipedia.org/wiki/New_Jersey_v._T._L._O.

    New Jersey v. T. L. O., [fn 1] 469 U.S. 325 (1985), is a landmark decision by the Supreme Court of the United States which established the standards by which a public school official can search a student in a school environment without a search warrant, and to what extent.

  5. 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 ...

  6. Special needs exception - Wikipedia

    en.wikipedia.org/wiki/Special_Needs_Exception

    The "special needs" exception is an exception to the Fourth Amendment’s general requirement that government searches be supported by a warrant and probable cause. [1] The exception applies when (1) the government conducts programmatic searches that are primarily aimed at advancing some special need other than criminal law enforcement, and (2) the government’s search program is reasonable ...

  7. Digital Search and Seizure - Wikipedia

    en.wikipedia.org/wiki/Digital_Search_and_Seizure

    Subpoenas do not have the same threshold of probable cause as required by search warrants under the Fourth Amendment. [6] Lastly, ISPs are generally private entities, therefore they can voluntarily search their users records and voluntarily turn them over to the government without violating the Fourth Amendment. [6]

  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. Weeks v. United States - Wikipedia

    en.wikipedia.org/wiki/Weeks_v._United_States

    Weeks v. United States, 232 U.S. 383 (1914) was a United States Supreme Court case in which the Court unanimously held that the warrantless seizure of items from a private residence constitutes a violation of the Fourth Amendment to the U.S. Constitution. [1]