The following excerpt is from U.S. v. Zermeno, 66 F.3d 1058 (9th Cir. 1995):
2 Exigent circumstances may excuse failure to make an announcement or to wait for the occupant to refuse entry. United States v. Mendonsa, 989 F.2d 366, 370 (9th Cir.1993). The existence of exigent circumstances is a mixed question of fact and law which we review de novo. Id.
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