Hard to imagine a 25-year-old local scam artist is so dangerous to the public that it was worth endangering the lives of many by opening fire in a crowded public spot.  Or enough to kill him, which is what they did.  Watched too many movies? Poor judgment call?  Poor training?  Personally  prefer the practice in Europe, where typically let the guy get away (and try to catch him later), rather than start a public gun fight that might kill or wound many onlookers.