United States v. Leal-Felix, __ F.3d __, 2011 WL 5966202 (9th Cir. Nov. 30, 2011) (a citation for a traffic violation is not an arrest for purposes of the illegal re-entry sentencing guidelines, at U.S.S.G. 4A1.2(a)(2); For the purpose of the Sentencing Guidelines, an arrest is a formal arrest. A formal arrest may be indicated by informing the suspect that he is under arrest, transporting the suspect to the police station, and/or booking the suspect into jail. (footnotes omitted)).