Police forces are using bait cars to catch car thieves. The cars have a GPS unit so that the cars can be tracked when stolen and the bad guys can be nabbed. Dallas is one place that uses one. The problem is that the GPS in one of the Dallas bait cars has failed after it was stolen and the cops have no idea where it is. To add a further wrinkle, the police are not willing to release a description of the stolen car, because they want to be able to use it again. If they can find it, that is.