What is knock-and-announce and when may it be waived?

• A. Police must announce their presence and purpose before entering a residence when executing a warrant, with limited exceptions (e.g., danger, threat to safety).
• B. They may enter without notice in all cases.
• C. Knock-and-announce applies only to non-warrant entries.
• D. The requirement is optional.

Answer: (A)

Knock-and-announce means officers must physically announce their presence and purpose before entering a residence to execute a warrant, then wait a short, reasonable period before forcing entry. The idea is to give residents a heads-up, reduce the chance of violence, protect personal property, and minimize unnecessary damage.

This requirement isn’t absolute; it can be waived in limited, well-justified situations. If delaying entry would create a real risk—such as danger to officers or occupants, or a likelihood that evidence could be destroyed or suspects could flee—law enforcement may proceed without waiting. In those cases, a no-knock entry is permitted, either under the warrant’s terms or because the circumstances create a legitimate exigent need. In normal circumstances, though, the knock-and-announce rule applies to protect rights and safety, with waivers arising only from these specific safety or evidentiary concerns.