Thought all SPF service revolvers have laser sight on them? If yes then the cop should have aimed below the torso to make him immobile. Probably cop was kancheong but then again can't really blame him. In that kind of situation facing a knife wielding Siao Lang, the poor cop was left with no other choice but to follow his gut instinct and just shoot the aggressor. Then again good riddance to this kind of human thrash. For this kind of case, SPF going to do a major investigation and in the end absolve the cop of any blame in the name of self defence.