The Exclusionary Rule Print E-mail
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The Exclusionary Rule
is the principle that evidence seized by police in violation of the constitutional protection
against unreasonable search and seizure may not be used against a criminal defendant at trial. The Supreme Court of the
United States
established the validity of the rule in Weeks v. United States (1914).  In Wolf v. Colorado (1949) the court
limited application of the rule to the federal courts; this decision was overturned in Mapp v. Ohio (1961), which required
the rule to be applied universally. In the 1980s the court allowed an exception to the rule, holding that evidence obtained
“in good faith” with a search warrant later ruled invalid is admissible.

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Video Glossary: The Exclusionary Rule
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