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  2. Aguilar v. Texas - Wikipedia

    en.wikipedia.org/wiki/Aguilar_v._Texas

    Aguilar v. Texas, 378 U.S. 108 (1964), was a decision by the United States Supreme Court, which held that "[a]lthough an affidavit supporting a search warrant may be based on hearsay information and need not reflect the direct personal observations of the affiant, the magistrate must be informed of some of the underlying circumstances relied on by the person providing the information and some ...

  3. Franks v. Delaware - Wikipedia

    en.wikipedia.org/wiki/Franks_v._Delaware

    Case history; Prior: Franks v. State, 373 A.2d 578 (Del. 1977): Subsequent: Franks v. State, 398 A.2d 783 (Del. 1979): Holding; Where a warrant affidavit contains a statement, necessary to the finding of probable cause, that is demonstrated to be both false and included by an affiant knowingly and intentionally, or with reckless disregard for the truth, the warrant is not valid.

  4. Probable cause - Wikipedia

    en.wikipedia.org/wiki/Probable_cause

    The usual definition of the probable cause standard includes “a reasonable amount of suspicion, supported by circumstances sufficiently strong to justify a prudent and cautious person’s belief that certain facts are probably true.” [6] Notably, this definition does not require that the person making the recognition must hold a public office or have public authority, which allows the ...

  5. Arrest warrant - Wikipedia

    en.wikipedia.org/wiki/Arrest_warrant

    For the police to make a lawful arrest, the arresting officer(s) must have either probable cause to arrest, or a valid arrest warrant. A valid arrest warrant must be issued by a neutral judge or magistrate, who has determined there is probable cause for an arrest, based upon sworn testimony or an affidavit in support of the petition for a ...

  6. Aguilar–Spinelli test - Wikipedia

    en.wikipedia.org/wiki/Aguilar–Spinelli_test

    In order to obtain a search warrant in the United States, a law officer must appear before a judge or magistrate and swear or affirm that they have probable cause to believe that a crime has been committed. The officer is required to present their evidence and an affidavit to a magistrate, setting forth the evidence. "An affidavit must provide ...

  7. Good-faith exception - Wikipedia

    en.wikipedia.org/wiki/Good-faith_exception

    For criminal proceedings, the exclusionary rule prohibits entry of evidence obtained through an unreasonable search and seizure, such as one executed under an invalid search warrant. [2] However, the good-faith exemption allows evidence collected by law enforcement officers pursuant to a defective search warrant if the officers reasonably ...

  8. Illinois v. Gates - Wikipedia

    en.wikipedia.org/wiki/Illinois_v._Gates

    Gates, probable cause was achieved for the warrant under the new "totality-of-the-circumstances" standard because the investigation by DEA and Detective Mader would have, on its own, been probable cause for a search warrant. [citation needed] The Gates' actions were suspicious because Florida is a known source of illegal drugs. Lance Gates ...

  9. Exigent circumstance - Wikipedia

    en.wikipedia.org/wiki/Exigent_circumstance

    Emergency aid doctrine is an exception to the Fourth Amendment, allowing warrantless entry to premises if exigent circumstances make it necessary. [8] A number of exceptions are classified under the general heading of criminal enforcement: where evidence of a suspected crime is in danger of being lost; where the police officers are in hot pursuit; where there is a probability that a suspect ...