Our local cops know...
1. Who owns the car.
2. If the owner has a criminal record, including traffic infringements.
3. Outstanding warrants. (obviously)
4. Also... If the car is registered and deemed legal for street use... And that the owner has a current drivers license. (again obviously)
And that's it. No real details of criminal history or traffic infringements... Just a yes or no.
The outstanding warrant information is more detailed.
Of course all that information is useless if the owner isn't driving the car.