there are some inconsistencies that are causing my gut to throw up red flags here....

The boy was expelled? was he also arrested?

Two weeks ago was the beginning of Christmas vacation, so I'm wondering how the school has acted so quickly in expelling the child during break? and why haven't they done anything in regards to keeping your daughter away from other kids that are associated with the situation once everyone is back...?

but the people who facilitated and encouraged it....

"facilitated" is an interesting choice of words... are there currently kids out there that helped with the sexual assault of your daughter? if so, getting them charged appropriately by the authorities would probably be a huge way of showing your daughter that you are on her team.

The last thing that I'm curious about is her age and the school situation.... You start by saying that she doesnt want to go to a new school because she has friends and teachers she likes, which implies that you have had the convo with her before about moving. but then you end by saying moving schools is not an option for a variety of reasons. This is confusing, and I would imagine it is for your daughter as well. if changing schools before the sexual assault was an option, why the heck wouldnt it be an option after your daughter was sexually assaulted by a fellow student[s]? If my daughter was being bullied, i would not be likely to offer to change schools for her, unless it was an easy thing to do. If my daughter was sexually assaulted, I would move heaven and earth to get her to a place in which she can be comfortable.

Sorry to grill you, and maybe you just communicated a few points poorly..... but I honestly don't think this is real.