Mapp v. Ohio

Mapp v. Ohio (1961) was a landmark Supreme Court case that established the exclusionary rule at the state level. The case involved police searching Dollree Mapp's home without a proper warrant and discovering illegal materials. The Court ruled that evidence obtained unlawfully cannot be used in criminal prosecutions, ensuring protections against unconstitutional searches and seizures. This decision emphasized that Fourth Amendment rights apply to state and local governments, not just the federal government, reinforcing the importance of privacy rights and proper legal procedures in criminal investigations.