What did Mapp v. Ohio strengthen in the legal system?

Mapp v. Ohio significantly strengthened Fourth Amendment protections by establishing the exclusionary rule at the state level. This landmark Supreme Court case determined that evidence obtained through unlawful searches and seizures cannot be used in court, thereby protecting individuals' rights against unreasonable searches by law enforcement. Prior to this ruling, the exclusionary rule was primarily applied at the federal level, but Mapp extended this mandate to state courts as well, reinforcing the principle that all citizens have the right to be secure in their persons, houses, papers, and effects against unreasonable searches and seizures. This ruling was pivotal in promoting judicial integrity and respecting the constitutional rights of individuals across the United States.