Mapp V Ohio Significance

What was the significance of Mapp v. Ohio?

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The significance of this case was that it introduced what is called the "exclusionary rule" to the legal systems of the American states.  (It had already existed on the federal level.)  This is the rule that says that illegally obtained evidence (gotten without a warrant, more or less) cannot be...

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The significance of this case was that it introduced what is called the "exclusionary rule" to the legal systems of the American states.  (It had already existed on the federal level.)  This is the rule that says that illegally obtained evidence (gotten without a warrant, more or less) cannot be used against a defendant in court.

The 4th Amendment protects us against illegal searches and seizures.  So let's say the police illegally search your house and find evidence of crime.  What can you do?  Before Mapp, all you could do was complain.  After Mapp, you (if you had a decent lawyer) could get that evidence excluded -- the prosecution could not use it against you in any way.

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