Britannica, "exclusionary rule" ([Internet, 2025-07-11](https://www.britannica.com/topic/exclusionary-rule))
EXP: exclusionary rule, in U.S. law, is the principle that evidence seized by police in violation of the Fourth Amendment to the U.S. Constitution may not be used against a criminal defendant at trial.
Britannica, "exclusionary rule" ([Internet, 2025-07-11](https://www.britannica.com/topic/exclusionary-rule))