That car has been handled by multiple people. Lesson one only buy a car from the person who is named on the title. I wouldve ran away at that point. As far as going to the police, try the secretary of state police. They might say contact local. Local will tell you it’s a civil issue. God forbid the car is stolen which may be the case. You probably should plug an obd computer into the port and verify the public Vin vs the Vin for the computer. Most likely you bought a retag.