The story says he was shot through the shower curtain. To become a deadly threat he would, at the minimum, have to get out of the shower. I don't think this one is that subtle.
The guy probably thought he'd be OK legally because it was in his house, and the media keeps portraying every potential self-defense case as if it's free for all. But he was wrong.
“”The story says he was shot through the shower curtain””
Is that kind of like being shot in the rear of the store?