My recollections on this are pretty hazy, but I think I have the salient points correct...
I'm thinking mid 1980s, a doctor was arrested for murder for shooting through a closed door and killing a person on the other side. The problems with the charges, though, were:
1. The doctor fired through his bedroom door.
2. It was in the middle of the night.
3. The person killed had broken into the home and was alleged threatening the doctor and his wife.
Back then Pennsylvania didn't have much in the way of codified castle doctrine at the time, relying primarily on the old Common Law standard that "a man's home is his castle."
Well, the prosecutor didn't agree, and filed murder charges against him, and took the guy to trial after trying his very hardest to get the guy to cop to all sorts of plea deals. If I remember correctly the doctor was either acquitted by the jury or on appeal, and it kicked off a big push in Pennsylvania to make changes to castle doctrine to clarify when deadly force could be used.
I've been searching the googletron, but so far I've not been able to come up with the case.