The following excerpt is from U.S. v. Warren, 916 F.2d 717 (9th Cir. 1990):
Warren challenges the denial of his motion to suppress evidence seized incident to his arrest. He contends law enforcement officers arrested him without probable cause. The determination of the existence of probable cause to arrest is a mixed question of law and fact that is reviewed de novo. United States v. Lindsey, 877 F.2d 777, 783 (9th Cir.1989).
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