when he could have called 911...he had no biz going out with a gun on a trespass!
I think a person has every bizness going out the door to thier property with a gun especially on a tresspass above most other things. Also when you call the cops they sure don't show up with rubber chickens they pack heat. Even though in most instances the officer will never have to draw his weapon his presence with the weapon is mostly what threatens a person into submission.
Going out to your own property armed for a tresspasser isn't bloodlust chest pounding its a rightful threat of force.
This guy had a threat of deadly force and advanced on the owner anyways. The owner has to assume any conflict will be over his weapon and will be deadly.
The guy who was shot called bluff and he was wrong.