Which case involved a violation of the 4th Amendment rights due to police entering a home without a search warrant?

The chosen answer, Mapp v. Ohio, indeed deals with the violation of 4th Amendment rights. In this landmark case, the Supreme Court ruled that evidence obtained from an illegal search and seizure, conducted without a search warrant, is inadmissible in state courts. The case arose when police officers forcibly entered Dollree Mapp's home without a warrant, searching for illegal gambling materials. They discovered obscene materials instead and used this evidence to convict her. This ruling established the exclusionary rule at the state level, ensuring that individuals’ rights against unreasonable searches and seizures are protected. This case is significant in reinforcing the necessity for law enforcement to adhere to constitutional guidelines when conducting searches, thereby upholding citizens' rights under the 4th Amendment.