It's like Tony Martin all over again but he did shoot someone in the back who was outside running AWAY from him. That is NOT self defence in opinion.
Killing someone who has broken into your home and is still inside is fair game as far as I'm concerned. Hence why there's a big knife in my bedside drawer because there are certain cases that haunt me. He'll get done if the firearm isn't legally held though.
There was a case a few years ago where two members of a certain community (much like the Tony Martin case) broke into an old couple's home - think it was somewhere in London or the outskirts - and the old boy got the better of one of them and killed him (inside) The CPS never pressed charges in that case but the community decided to have the funeral procession or a march (can't remember which) right past the house where it happened. I am willing to bet money that couple had to move away from that home they'd lived in for many years and go into witness protection because, to my knowledge, we've never heard anything about it since.
EDIT - here's the case I'm talking about:
Henry Vincent, 37, died after breaking into the south east London home of Richard Osborn-Brooks, then 78, last year. He and his wife now have new identities and live in a mystery location.
www.dailymail.co.uk