United States v. Ortuno-Higareda, 450 F.3d 406 (9th Cir. Jun. 8, 2006) (district court had jurisdiction to revoke defendant's supervised release upon illegal re-entry; sufficient evidence existed, without conviction for illegal re-entry, to prove that defendant violated the conditions of his supervised release).
http://caselaw.lp.findlaw.com/data2/circs/9th/0410257p.pdf