<P> Mapp v. Ohio , 367 U.S. 643 ( 1961 ) , was a landmark case in criminal procedure , in which the United States Supreme Court decided that evidence obtained in violation of the Fourth Amendment , which protects against `` unreasonable searches and seizures , '' may not be used in state law criminal prosecutions in state courts , as well as in federal criminal law prosecutions in federal courts as had previously been the law . The Supreme Court accomplished this by use of a principle known as selective incorporation ; in Mapp this involved the incorporation of the provisions , as interpreted by the Court , of the Fourth Amendment which are applicable only to actions of the federal government into the Fourteenth Amendment due process clause which is applicable to actions of the states . </P>
<P> Mapp v. Ohio , 367 U.S. 643 ( 1961 ) , was a landmark case in criminal procedure , in which the United States Supreme Court decided that evidence obtained in violation of the Fourth Amendment , which protects against `` unreasonable searches and seizures , '' may not be used in state law criminal prosecutions in state courts , as well as in federal criminal law prosecutions in federal courts as had previously been the law . The Supreme Court accomplished this by use of a principle known as selective incorporation ; in Mapp this involved the incorporation of the provisions , as interpreted by the Court , of the Fourth Amendment which are applicable only to actions of the federal government into the Fourteenth Amendment due process clause which is applicable to actions of the states . </P>
what was the issue in mapp v ohio
what was the issue in mapp v ohio
evidence obtained in violation of the Fourth Amendment , which protects against `` unreasonable searches and seizures , '' may not be used in state law criminal prosecutions in state courts
evidence obtained in violation of the Fourth Amendment , which protects against `` unreasonable searches and seizures , '' may not be used in state law criminal prosecutions in state courts