The Exclusionary Rule is a legal principle in the United States that prevents evidence obtained through illegal means from being used in court. This rule is designed to protect individuals' rights under the Fourth Amendment, which guards against unreasonable searches and seizures. If law enforcement violates this amendment, any evidence gathered as a result may be excluded from trial. This rule aims to deter police misconduct and uphold the integrity of the judicial system. It applies to various types of evidence, including physical items and witness statements. The Exclusionary Rule is a critical aspect of ensuring fair legal proceedings and protecting citizens' constitutional rights.