Interesting case. As a fake attorney, I'll argue that the patron's instinct to defend himself overrides his last shots when the perp was down. I've taken self defense courses and your mind is not in a clear mode. Basic instinct takes over. Perhaps he simply hated niggers and he wanted revenge but the nigger literally triggered the patron to shoot him down in the first place. I would not have had the clear insight to assume the first rounds of shots were enough to remove the threat. Niggers are tough to kill even with a 9mm bullet. Fortunately, most niggers don't have weapons training and are very bad shots. Play stupid games, win stupid prizes.