Okay, gotcha, thanks for clarifying. I don't like jumping to conclusions, if I don't understand the argument I'll say so and spare myself the embarrassment of assuming.
I don't know that the shooter didn't call LEO, I saw nothing to suggest that he had or had not, so that's a moot point for me.
I'm not with you on the shooter leaving, the shooter was on his property the whole time, had no obligation or duty to leave, especially with an aggressive bozo getting nasty with the spouse. It might be what some folks would do, but it's not what I would do. Coming back with a gun after said bozo has been asked to leave and is now trespassing and getting nasty with the spouse? You can wait until he snaps her neck if you want... Me, I'd have just gone and gotten the gun, like the guy who is still alive did. As an aside, asking the aggressor to leave satisfies any obligation to attempt to de-escalate the situation.
As for whether or not he was looking to kill the guy, I won't pretend to know his motives, but I have to admit that there's plenty of justification for what he did that meets the standards of the presumption of innocence and reasonable doubt.