Summary
United States v. Leon, 468 U.S. 897 (1984), held that the exclusionary rule generally does not bar evidence seized by officers who reasonably rely in good faith on a search warrant later found invalid. The decision created a major Fourth Amendment doctrine while preserving suppression for serious police misconduct or plainly unreliable warrants.
Legal Issue
Does the Fourth Amendment exclusionary rule require suppression when officers reasonably rely on a search warrant issued by a neutral judge, but that warrant is later held invalid for lack of probable cause?
Holding
No. Evidence may be admitted when officers act in objectively reasonable, good-faith reliance on a warrant issued by a detached and neutral magistrate, unless recognized limits apply, such as false or reckless affidavits, judicial abandonment of neutrality, bare-bones probable cause, or a facially deficient warrant.
Rule of Law
If police get a warrant from a neutral judge and reasonably rely on it, evidence is usually not thrown out just because a court later finds the warrant defective.
Court Reasoning
Not yet summarized.
Impact for Officers
Leon remains central to search-and-seizure litigation, warrant drafting, affidavit review, suppression motions, and law-enforcement training on objective reasonableness.
What Officers Can Do
Not yet summarized.
What Officers Should Avoid
Not yet summarized.
Common Misunderstanding
Not yet summarized.