I'm Lucy, and I'd be happy to answer your questions today. I'm sorry to hear that this happened.
If your daughter is a minor, you can file a battery and false imprisonment case against the other girls as "next friend" on your daughter's behalf, over her objection. It is possible to win the case without her testimony when you have a tape recording of the incident. Damages can be proven by producing copies of your daughter's medical bills. But you should know that the judge can also order her to testify if she's there in court with you.
Illinois law also allows the parents of a minor child to be sued for wilful acts committed by the child. 740 ILCS 115/3. You could bring a lawsuit against the parents of each of the teenage girls, and under that statute, they could also be required to reimburse you for up $15,000 in attorney's fees. Another option, if you wanted to avoid dragging your daughter to court, is to have a local attorney attempt to settle with the parents, taking their legal fees from the settlement.
If you haven't already done so, you can also file a police report. They can view the tape and choose to press charges over your daughter's objection.
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