United States v. Anderson, 625 F.3d 1219 (9th Cir. Nov. 16, 2010) (federal offense of being a felon in possession of a firearm, under 18 U.S.C. section 922(g)(1), required only that the defendant be "convicted" of a previous felony, as defined by the jurisdiction in which the proceedings were held, and here California law treated a plea of nolo contendere as equivalent to a guilty plea).