My friends wife just called me after picking up their 97 twin from the shop. It just stoped on the side of the road and one of the rear wheels is locked. She just had suspension put on the car. It drove fine for a bit and then one of the rears locked up. He is on his way there now and so am I but we are not sure what it could be. Did they jack up the parking break? Locked caliper? What do I check first? The shop is closed at this point. Any idea before I leave?