2) there was a confrontation between the two men,
A dude visiting a home where his girlfriend lived shot a dude in the side yard for not obeying his command.
Only in Georgia lol...
Honestly, in Iraq, in battle, that's how it would go down. You locate the enemy unknown, you give an order to stop moving, and even if the language is different, if he advances, you triple tap him center mass and drop him. On the other side of the world, he'd be fine doing it. He was (probably) quite annoyed at police taking so long to arrive, went out there, and when the adrenaline kicked in, his training returned. He handled it very much like one would in field, right?
Maybe he's preparing the PTSD defense...which would throw the self-defense thing out the window. Once we hear the 911 tapes, self-defense may have sailed anyway.
it's long past "tragic mistake"... traveled into side yard to give orders, fired on a shadow that didn't listen, and he didn't even live there...