What legal principle was established by Mapp v. Ohio?

• A. Public defense counsel is guaranteed for defendants
• B. Unlawfully obtained evidence is inadmissible in court
• C. Officers must identify themselves before making an arrest
• D. Sparks the community policing movement

Answer: (B)

The legal principle established by Mapp v. Ohio is that unlawfully obtained evidence is inadmissible in court. This case extended the exclusionary rule, which had previously been applied only to federal cases, to state courts as well. The ruling was based on the Fourth Amendment, which protects against unreasonable searches and seizures. The Court determined that evidence obtained without a proper warrant or through illegal means cannot be used to prosecute individuals in court. This landmark decision reinforced the importance of protecting individual rights and maintaining the integrity of the judicial system by ensuring that law enforcement officials adhere to constitutional standards when gathering evidence.