What is the rationale for the Supreme Court's holding that secret agents do not come under the protection of the Fourth Amendment? What are the issues in the following case? Police officers execute a search warrant without knocking or otherwise announcing their presence. They had received a tip seventy-two hours earlier that the person who resided at the place to be searched had a gun [State v. Watkins (Wis. App. 1993)]. Define the exclusionary rule, state its underlying justification, and explain the specific impact the holding in U.S. v. Leon has on it. If a state supreme court decided it did not agree with Leon, what can it do to avoid its ruling?