The Supreme Court case of Weeks v. United States was important because it established the doctrine of "exclusionary rule" in federal criminal cases. This rule prohibits the use of evidence obtained through illegal search and seizure by law enforcement from being admitted in federal courts. The case affirmed the Fourth Amendment rights of individuals against unreasonable searches and seizures, thereby providing constitutional protection for the privacy and property of individuals. This ruling has had a lasting impact on the criminal justice system as it ensures that any evidence obtained through unconstitutional means cannot be used against the defendant in a federal court trial.
