I agree he more than likely had a plan to commit a murder. Sorry if I wasn't clear enough.
Edit. Really, I agree to both. He also should have chosen his words more wisely if he was planning on claiming self defense.
^x2
I hate to admit it but I think he was out looking for trouble and he got in way over his head so he figured he "had no choice".
I hope I NEVER have to take another life, even in defense of myself or my family. However if I do wind up in that situation I'm going to be ripping up my shirt to make bandages and giving him CPR until the police arrive. Even if he is already dead I want to know I did everything I could. At least then my conscience will be clear and I can just put it behind me.

