I'm not sure how much of this is true, but I was told if you are a martial artist, you are legally bound as any part of his/her body is deemed lethal weapons (legs, fists etc etc). As he being a MMA fighter it will defiantly bring him into some sort of legal battle. No matter what, you are trained to be composed. He is at total fault and so as the other guy. Now giving that interview with TMZ, it will cause more grief for him if the police gets involved. His buddy tried to hold him back because he knew what damage he can do, but Roger was totally enraged already.