What is the "exclusionary rule"?

The exclusionary rule is a legal principle that prohibits the use of evidence in court if it has been obtained in violation of a defendant's constitutional rights, particularly the Fourth Amendment, which protects against unreasonable searches and seizures. This rule is rooted in the need to deter law enforcement from engaging in unlawful practices when collecting evidence. It serves to uphold the integrity of the judicial process by ensuring that courts do not condone illegal behavior by admitting tainted evidence.

By excluding such evidence, the rule aims to protect individuals from potential abuses of power by the state, reinforcing the idea that obtaining evidence in an unconstitutional manner undermines the fairness and reliability of judicial proceedings. This principle has been established through various court rulings over time, signifying its strong foundation in constitutional law.