From Bad to Worse, What's With This?

I had a parent conference for report cards yesterday. That was the good part of it all. We have had horrible problems with bullying, it is constant and daily. One child is the ringleader and the rest afraid to break away. I can't say as I blame them. I have seen this child in action and she isn't even afraid of adults. I realizr she has something big going on, and she has to go to school somewhere, but I have to also protect my child above all. This has so clouded everything else that I have forgotten that we ever had any issues other than this one. I told them that everything else pales in comparison, and that I didn't see anything else worth discussing at that point. I really can't believe this is happening. I don't know how long to let things resolve, I know they are trying different ways of dealing with this problem. I guess I will keep on them and see how it goes.