There was no imminent threat. The 4 hoodlums who committed home invasion, were no longer in the home. This guy had to go out of his way to track them down and shoot one of them. (The home-invader who got shot is now dead.)
That doesn't sound like self-defense to me.
[The homeowner] was taken into custody and police are now working with the district attorney's office to see if they are going to file charges against him.Not where we want to be. The rule of law is a good thing, people.