Recently, a routine police patrol was parked outside a local neighborhood bar in Minnesota.
Late in the evening, the officer noticed a man leaving the bar so intoxicated that he could barely walk. The man stumbled around the parking lot for a few minutes with the officer quietly watching.
After what seemed an eternity and trying his keys on five different vehicles, the man managed to find his own car which he fell into. He was there for a few minutes as a number of other patrons left the bar and drove off. Finally, he started his car, switched the wipers on and off (it was a dry night), flicked the hazard flasher on and off, tooted the horn and then switched on the lights. He moved the vehicle forward a few inches, reversed a little and then remained stationary for a few more minutes as more patrons left in their vehicles.
At last he pulled out of the parking lot and started to drive slowly down the street.
The police officer having patiently waited all this time, now started up his patrol car, put on the flashing lights, promptly pulled the man over and carried out a breathalyser test.
To his amazement the breathalyser indicated no evidence that the man consumed alcohol at all!
Dumbfounded, the officer said "I'll have to ask you to accompany me to the police station. This breathalyser equipment must be broken."
"I doubt it," said the man. "Tonight I'm the designated decoy."
They were havinng trouble gathering usable evidence against a suspected house of ill repute. Figuring that discouraging the use of the establishment by it's patrons, might have the same effect as raiding it.
They put a clearly marked Sheriff's dept car at the entrance to the parking lot. This really worked for a few days as customers tended to stay away.
Then the owners put up a sign stating,
"PARKING SECURITY PROVIDED BY
BEXAR COUNTY SHERIFF'S DEPT."