Just a thought:
I parked next to an "ex"-police car last week, that still had the spotlights on it, but overheads and etc removed.
I used to drive a retired unmarked police car (actually a Lumina, not the standard patrol cars) I picked up cheap at auction after it was totalled in a wreck, and I've wondered why some Depts leave the spotlights on the old patrol cars. I recall one guy in Pasadena used to keep getting himself arrested for impersonating. (I never was tempted to do that, I just got lucky getting a good cheap car from knowing the officer who wrecked it, and other than no hubcaps etc, it looked like any other Lumina)