I completely understand your feelings. I feel the same way, but I wouldn't keep my knee on someone's neck and refuse them help for 9 minutes. You probably wouldn't either, I'm guessing.
I feel sorry for all these officers, but GF is dead. If they could have prevented it, but they didn't, they have to answer for that. It's just like if you make a mistake driving and wind up killing someone. It's still manslaughter whether you meant it or not. I think we have to take our personal feelings out of it and only look at the facts.