Help... Vin #'s dont match

The rest of the numbers have already been proven to be meaningless in his state with the issue of a title in his name.
You could probably just have your car impounded
until it can be proven not stolen and have yourself arrested for the posession of property that has the possibility of being stolen. Then you can pay any fines and or fees for the rehabilitating yourself of such possible crimes. Sadly they probably would accommodate you on this.
The legal process is to take the title that has been issued to you and register, insure and drive your car.