United States Vs Leon 2025 Case Brief. The united states supreme court broke with precedent and established law by declaring that the exclusionary rule is merely a deterrent against faulty police work. Leon was the target of police surveillance based on an anonymous informant's tip.

With him on the briefs were assistant attorney general trott, deputy solicitor general frey, kathryn a. Leon began in 1981 when an informant communicated to police in.