Yeah, I've heard (but am no expert) that warning shots aren't something that helps you (legally) in an SD case. State by state, maybe.
One thing I did want to mention is people are just casually mentioning take him to court. The cost (lawyer) and delays (months at a minimum) involved in taking someone to court are amazingly prohibitive. My divorce easily cost me $40g (lawyer fees alone) and we didn't even go to trial! In hindsight, since the guy died, court obviously would have been a better alternative, but I don't think it is as clear cut a decision until very late in this drama. The cops should certainly have been called (by somebody, everybody) to prevent this episode from escalating like it did.
I also wanted to opine that many people hate their lives, hate their significant other. They may not be seeking death, but they view their life as so shitty that they don't really give a crap and putting themselves in a potentially life threatening situation isn't a real problem for them. Once they get shot, different story. This guy here, the couple in Pennsylvania...
And speaking of the couple in Pennsylvania, I have been fascinated by that video since it first came out. I'd love to know the caliber of the pistol (I assume the rifle is .223), and the shot sequence, hits, etc. I would guess (just on probability) that the pistol was a 9mm. Even with a 9, I think he might have gotten hit a couple of times in fleshy areas, and it wasn't until one hit hit a bone or a big organ that he reacted. Anyone have any follow up info on? I know there are other similar videos on YouTube, but haven't really gone down that rabbit-hole. But this is a great instructional video for anyone who owns a fire-arm for self-defense; it's utility would be greater with additional info on calibers, which shots hit, where, etc.