Oh now i understand the story, The car is with some corrupt govt official, and if that is the case, Kiss ur Car, Bye,Bye, they can only be caught if there r stopped at a big check post with high officials and media, happened a few months back and many such cars were recovered.
How do u know that the car was being driven in Sea View and the police kahaani?
A way i can see to recover ur Car i see is, try to find out where the car is parked, don't in any way let the theif know that u r following them. once u find out where the car is, don't go and ring the bell and ask for the keys. hide in a safe and far place where they can't see u and keep a close eye on the Car, call the police saying u found the Car and tell them the address of where u found it. Wait for the copsto arrive and let them do their job