If officers legally obtain a search warrant but fail to follow proper knock-and-announce procedures:

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Quizplus · Accepted Answer

The exclusionary rule, which might render evidence inadmissible due to illegal search procedures, does not automatically apply to violations of the knock-and-announce rule. If the search warrant itself is valid and the officers are legally present and executing the warrant, the evidence they seize can still be admissible in court, despite the procedural violation.

If Officers Legally Obtain a Search Warrant but Fail to Follow