Contact the police where it was stolen and make a report. Then contact the police where the ID was used and report it stolen as well. If the traffic violation was recent, it's possible the officer may still recall the person who used your identity and may be able to make a photo comparison. Ultimately you may need the assistance of a defense attorney in the other state to help you. Start by making phone calls and doing phone consultations. An initial consultation should be free. Good luck.