I think the point he was making is merely there is no proof YET he got violent or physical with her. Also, not all men who have a controlling or jealous nature move on to murder.
I am of course aware that not all abusers move on to murder and in this case I don't think, if it happened somewhere close to the way I conjecture, it would have been "an accident" of sorts as I don't think OP probably intended to actually kill, probably just open the door, albeit technically it would I think still be qualified as a murder for court purposes and I would think that right because you just can't go around shooting at doors you know someone is behind. I was merely thinking that Trooper was trying to prove with "90% loving" that it wasn't indicative.