If someone got shot, the rest of it is sort of moot, isn’t it? Responding to trespassers by pulling out a gun is insane to begin with, if the trespassers aren’t doing anything else to imply a threat. Blocking the trespassers from leaving the property is bad enough, but to then threaten then with a gun is horrendous in its own right. Pointing that gun at them is insane unless he intended to shoot them.
If he was shooting targets for practice and had a lapse of judgement and accidentally shot someone, sure, that is a different situation. If you knowingly and intentionally point a gun at someone and “accidentally” shoot them, I don’t see how that is any different than intentionally shooting them, other than the timing of when you pull the trigger.