Makes me think of a story I heard once...
A cop watches from his patrol car as a man walks out of a bar, stumbling badly. He goes to the wrong car, finally finds the right one, drops his keys, and eventually gets in the car. He turns onto the street. The cop follows and observes the man weaving for a couple miles before pulling him over.
After the man passes THREE breath tests, the cop says “I don’t get it...I watched you come out of the bar. You could hardly walk and were weaving down the street.”
“Of course I was”, the man replied...”I’m the designated decoy.”
similar story - in ‘82 - at college - one of the few nights I was sober at a party....left around midnite - dropped my keys in the lot and was followed by an unmarked, all the way home - (15mi) didn’t get pulled over