I'm confused about the exact details here -- does he believe there is an auto plate tracker which shows the name the vehicle is registered to (him) which gets a false-positive on a secondary search for name? It would seem more reasonable to have a list of suspects/warrants, and then a list of their own vehicles, and just pop it up then. You'd also want to find cars the suspect was known to drive, since it's pretty common for a "criminal" to register his property in someone else's name to protect from seizure.

I think it would be more plausible that he was profiled for race/location/type of vehicle/etc., rather than his name, but maybe there are more specifics?