Facts
- Detroit police obtained a warrant to search Booker T. Hudson, Jr.’s home for narcotics and firearms.
- Officers announced “police, search warrant,” but waited only three to five seconds before entering through an unlocked front door.
- Inside, officers found Hudson seated while others moved about the house.
- The search recovered crack cocaine from Hudson’s pockets, additional bagged cocaine, and a loaded revolver near where he had been sitting.
- Hudson moved to suppress the evidence, claiming the short wait violated the Fourth Amendment knock-and-announce requirement.
- A trial court granted suppression; the Michigan Court of Appeals reversed; Hudson was later convicted, and state appellate courts declined relief.
Issues
- Whether a Fourth Amendment knock-and-announce violation requires suppression of evidence seized during execution of an otherwise valid search warrant.
Decision
- The Supreme Court affirmed.
- The Court held that a knock-and-announce violation does not require suppression of evidence when the search is authorized by a valid warrant (or is otherwise lawful).
- The Court reasoned that the deterrence value of exclusion in this context is small and outweighed by the social costs of suppressing probative evidence.
- Justice Kennedy concurred in part, emphasizing the ruling’s limited reach to knock-and-announce violations.
- Justice Breyer dissented, arguing suppression is needed to meaningfully enforce the knock-and-announce requirement.
Legal Principles
- The exclusionary rule is a remedial doctrine applied only when its deterrence benefits outweigh its substantial social costs.
- Suppression requires more than a mere but-for connection; exclusion may be denied where the causal connection is sufficiently attenuated or where exclusion would not serve the interest protected by the violated rule.
- The knock-and-announce requirement protects interests in safety, property, and privacy from sudden entry, not an interest in shielding warrant-described evidence from seizure.
- Because the interests protected by knock-and-announce are not served by excluding evidence found under a valid warrant, exclusion is generally an improper remedy for such violations.
- Civil suits and internal police discipline are recognized as alternative deterrents for knock-and-announce violations, reducing the incremental benefit of suppression.
Conclusion
A premature entry that violates the knock-and-announce requirement does not trigger the exclusionary rule when officers execute a valid warrant; suppression is denied because the protected interests are unrelated to evidence seizure and the deterrence gains are outweighed by the costs of exclusion.