To point a gun at someone--a devastatingly dangerous and insane action in itself--AND pull the trigger is clearly first degree murder in my book. He would have to successfully argue that he didn't mean to pull the trigger for me to think otherwise, and it sounds like there were witnesses who saw him point it at her and pull the trigger. Why, why why, would he pull the trigger of a deadly weapon while pointing it at someone if he did not intend to harm them?
I disagree.
if in his mind he unloaded the firearm (by removing the magazine) he demonstrated he did not intend to shoot her.
He still very guilty of stupidity, pointing a firearm, and reckless homicide, but first degree murder this is not.