Any "solutions" that would have any effect on such killings would be too draconian to implement. The cure would end up being worse than the disease. Gun control obviously had no effect on this LEO. Did it leave the victims helpless? (Correct me if I'm wrong, but I believe Wisconsin has no provision for CCW by private citizens anyway.) I'm curious if his weapon was in fact an "assault" rifle or was it merely a self-loading lookalike? It seems that some people have difficulty with the distinction.

One things for sure. If you ever find yourself in the middle of someone else's domestic disturbance, stay the hell out of it if you possibly can. It appears that calling this scumbag a "pig" is what set him off.