I tried to do something similar on a 1985 CHP Mustang -
There are only a couple of in-service pictures of the 85 SMPV's (Specially Marked Patrol Vehicles), and none of the cars have been found. Seeing the car's tag number, I was able to determine its CHP Unit Number. While asking my contact to check for CHP Assignment Cards on members who had asked, I included that one. Here is a copy of the card I received on #E408445 -
So I pulled the VIN from the card (removed from the above pic) and had a CARFAX run. It showed an accident about 10 years ago in New Mexico, and listed the date and report number. I contacted the County and State about getting a copy of the accident report to see who owned it at the time, but came up empty. Too bad - the car hasn't been tagged in a while and is probably rotting away.