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What legal rule was established by Mapp v Ohio?

  1. Evidence obtained illegally cannot be used in court

  2. All search warrants must be approved by a judge

  3. Evidence is admissible if it is relevant

  4. The right to privacy is absolute

The correct answer is: Evidence obtained illegally cannot be used in court

The ruling in Mapp v. Ohio established the legal principle that evidence obtained through unlawful search and seizure cannot be used in court. This decision extended the exclusionary rule, which had already been applied to federal courts, to state courts, thereby reinforcing the Fourth Amendment protections against unreasonable searches. The case involved a woman named Dollree Mapp, whose home was searched without a proper warrant, leading to the seizure of evidence that was later used to convict her. The Supreme Court concluded that states are required to uphold the same standards of evidence as the federal system, ensuring that individuals are protected against violations of their constitutional rights, particularly regarding privacy and due process. This landmark decision has had a significant impact on how law enforcement conducts searches and gathers evidence, emphasizing the importance of legal procedures in safeguarding individual rights.