Boggs v. United States

the conditions of § 3109 for forcible entry explicate fundamental purposes of the fourth amendment, and failure to observe them may be unreasonable under the amendment | knock and announce requirement of 18 U.S.C. § 3109 incorporated into fourth amendment | knock and announce requirement of 18 U.S.C. § 3109 incorporated into fourth amendment | trial court’s failure to impose a sanction sua sponte for failure to preserve discoverable material, after defense fails to request a sanction, will only be reversed upon a finding of plain error | section 3109 requirements have been incorporated into the fourth amendment | section 3109 requirements have been incorporated into the fourth amendment