Back in the late 60's, when cars had one key to open the door and another key for the ignition: the town I lived in had cop cars that were all white with no insignia, only the city & police printed on the trunk. I came out of a Denny's and stuck my key in the car door, opened and started to slide in when I noticed a shotgun strapped to the inside center. Big gulp, sneaky look-around, saw no cops (but had seen them at lunch), softly got out of the car, closed and locked the door and found MY car, about 3 cars farther down.