The bad homeowner hits him again as he reaches for a phone and knocks him into the kitchen area. You ain't calling nobody. The bad neighbor snarls. The good homeowner sees the man coming at him again. He reaches out and finds a large kitchen knife and buries it in the chest of the bad neighbor.
Police arrive and take the good neighbor to headquarters for questioning.
It may appear as a good self-defense case. Now enter a local prosecutor that doesn't see it that way. The prosecutor has a solid case in his mind. This man did not avoid the problem. He engaged in verbal patronizing responses to the deceased.