Read the article. He shot the man ten feet away who was not a threat.
That was only true, I think, if the shot man did not shift his weight.
Consider also that the author grants that just prior to the shooting, deadly force would have been justified. Put yourself into such a scenario. How much might your judgment be affected by having just experienced a situation in which you would have been fully justified in killing someone. The ex husband created this deadly situation and paid a price for it.
We could very easily be discussing a death caused by the ex husband taking the rifle and killing the resident if the altercation had continued without the shooting that occurred.
Similar to the Rittenhouse case we are seeing more people who believe that they need not fear armed self-defense.