I'm 90% certain this was justified. This guy is a CCW permit holder, probably NRA member, possibly a veteran, and maybe even a freeper. In other words, just like you and me.
But we all know some folks in the firearms realm who just ain't right and end up messing it up for all of us by giving the Brady bunch examples upon which to expand.
It looks like this dude's biggest mistake was confiding in his father.
"The elder Loudon can't help but wish his son had simply gotten out of the way."
"I don't think he would have been quite as anxious to pull the gun"