the government's burden of proving all elements of the crime." United States v. Washburn, 444 F.3d, 1007, 1113 (8th Cir. 2006); see also, Server v. Mizell, 902 F.2d 611, 615, (7th Cir. 1990); United States v. Granbois, 119 F.App'x 35, 38-39 (9th Cir. 2004). Defendant's lone district court opinion doe