What does the exclusionary rule state regarding evidence obtained unlawfully?

The exclusionary rule states that evidence obtained unlawfully cannot be used in court because it is considered 'fruit of the poisonous tree.' This legal principle is grounded in the protection of Fourth Amendment rights, which guard against unreasonable searches and seizures. The rationale behind the exclusionary rule is to deter law enforcement from engaging in illegal conduct and to uphold the integrity of the judicial process. If evidence is acquired through improper means, such as a violation of an individual's rights, it tarnishes the judicial system, and thus the law bars its admission in court. This serves to encourage law enforcement to follow constitutional procedures and respect individuals' rights during investigations.