I'm not sure about the arrests thing, but the police had been warned that these people had been threatening my aunt, so they SHOULD have known this was going to happen. I'm not too clear on the details, since most of the people that were there don't want to talk about it. The people that do mention it are the girls, and they are more preoccupied with the fact that people's clothes were torn. I guess that was the only thing they could relate to in the whole fiasco. tearing clothes means getting in trouble.