I wouldnt get too het up about it if you dont know the full details of the situation.
I'm rather glad, actually, that an appeal to sense and analysis of the particular circumstances can be made and "But he hit someone" isnt an automatic charge.
I've been there myself, in fact - didnt go to court but the police were intent on understanding the exact details of the situation and taking according action, which in this case was arresting the guy whose nose I broke! Seem odd? Thats because, like here, you dont know the full facts :)