If the body was found inside of his home, I'm not sure the defense has a leg to stand on.
If you're gonna shoot someone, by far the best place to shoot is in your own home, that way you have a chance to claim self-defense. (Unless you live in Florida, where you can carry a gun in public, approach an unarmed black person, shoot him, and then still claim self defense).
He shot her 4 times, so the burgular angle will not work.
When cops shoot suspects, their bodies are riddled with bullets. If I had an intruder in my house I would put at least
3 bullets into the chest.
I don't know how the system works down there, but in America a good lawyer could get him off.