In Mapp, the Court held that the exclusionary rule was an “essential part” of the Fourth Amendment, and that the Fourteenth Amendment’s Due Process Clause, which says that “No state shall…deprive any person of life, liberty, or property, without due process of law,” meant that the federal exclusionary rule now applied to the states. “Since the Fourth Amendment’s right of privacy has been declared enforceable against the States through the Due Process Clause of the Fourteenth, it is enforceable against them by the same sanction of exclusion as is used against the Federal Government.” ( http://billofrightsinstitute.org/resources/educator-resources/lessons-plans/landmark-cases-and-the-constitution/mapp-v-ohio-1961/
In Mapp, the Court held that the exclusionary rule was an “essential part” of the Fourth Amendment, and that the Fourteenth Amendment’s Due Process Clause, which says that “No state shall…deprive any person of life, liberty, or property, without due process of law,” meant that the federal exclusionary rule now applied to the states. “Since the Fourth Amendment’s right of privacy has been declared enforceable against the States through the Due Process Clause of the Fourteenth, it is enforceable against them by the same sanction of exclusion as is used against the Federal Government.” ( http://billofrightsinstitute.org/resources/educator-resources/lessons-plans/landmark-cases-and-the-constitution/mapp-v-ohio-1961/