Did they know with absolute certainty in that split second the object he turned the corner pointing at them with was a golf club? No. Your brain reacts in one way, when you're threatened you retaliate. They were already headed into a situation where gun fight was a strong possibility, if some dumbass is going to pop out of a corner holding a club like an assualt rifle knowing that police are coming through with guns drawn expecting a firefight your dumbass deserves to get shot. This case they had probably cause to fire. What would have happened had they held fire and it was an assault rifle he turned the corner with, they would have died instead of him. It's alright to call out injustices and misuse of force in most of these cases, this shit aint one of them. Quit giving stupid fuckin people a pass for their actions. The guy was killed because of his fuckin actions and his actions only.