Cop last saw the gun 0.837 seconds before shooting. His shot went off 0.04 seconds after the first appearance of the empty right hand, couldnt react fast enough to not shoot. Maybe slightly imperfect, he may have had another tenth of a second to wait and see without being at risk himself. If kid had turned a little slower mightve worked out, slightly imperfect by kid too. Shooting 8 times middle of night in chicago ghetto war zone and running from cops turns out is risky