Incorrect dash vin tag

What does the title match ?
What if he likes his car and wants to keep it?

Then he could lose it anyway.

The time to report a crime is right away.

It would be idiotic to just become another crime supporter.

And since the insurance fraud issue comes into play, if he has the car insured and it gets damaged through no fault of his own, his claim can be denied since the policy 'matches' the dash only, not the body.