Was he ever warned? You can't just DQ a fighter without warning them first.(Unless he really does something that warrants a DQ but that almost never happens)
Obviously, punching in the back at the kidneys, I can understand. But if you go to the body, how do you distinguish the kidney shot was intentional or not? I've seen so many stoppages via kidney shots, I'm sure Khan put Maidana down with one too.
I believe the punch was legal in the US, but not in some of the countries Robinson fought in his European tour, leading to him being Initially D.Q in one of those bouts
Kindey punches are punches to your lower back, livershots are at the right side of your body. I think you've confused the two