The first thing I would do would be to schedule an immediate appointment with the highest ranking school official you can reach. Do NOT be rude or obnoxious in any way. You are a parent who is concerned for the safety of a child and you need the help and assurance of the school to make certain your daughter is safe from this child while she is on school property.
Give then an opportunity to tell you how they will fix this problem. If they ask YOU for a suggestion, then you suggest that an adult be assigned to shadow this girl every moment she is on school grounds. (This is a reasonable request considering the assaultive nature of this child.) If they tell you they cannot, you can tell them that you or a family member will come to the school as a protective detail for your daughter if need be but that you will have no choice but to sue the school to be compensated for the missed days of work.
The bottom line is that if this girl is a special needs child, the school is required by law to provide the services that she requires. If she cannot be expelled, then the school needs to take other steps necessary to keep the students safe. After you have your meeting, make certain that you write a follow up letter to the school.
You need to describe what was discussed during the meeting so you have written proof of what happened. If you can't get any satisfaction from the school after you jump through these hoops, you can attempt to request a restraining order.
You can file for a restraining order but it will not likely get granted by the judge because the child is enrolled in the school...therefore he has to be on the same grounds as your daughter. The school needs to deal with this issue. They know the legal ways to do so.
I would take it before the school board. They will have more say in the matter than just the principal.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.