I recall an incident from some years ago........a reaaaallllly intelligent person set out to rob a gun shop.
He drove into the parking lot and parked between a marked county sheriff car and a marked city police car. He walked into the shop, to the sales counter where several uniformed law enforcement types were standing, talking with the owner.
This bright individual pulled a gun, fired a shot into the wall behind the owner and demanded all his money.
The coroner found bullets from 6 different guns in the corpse.
I suspect that was a really depressed individual who wanted to commit suicide by cop.
Along the same lines.
http://www.military.com/video/guns/pistols/somebody-picked-the-wrong-diner/1832757411001/