Welcome to the forum.
I am so sorry to hear about your child's ordeal. Certainly, she is very well supported by her family, so should feel protected from further abuse.
At one time I would not have believed that the WTS would not immediately, upon evidence, have taken action against this person. Instead, they vilify those who dare "disturb" the congregation, and protect the perpetrator of abuse.
I hope this person is given punishment by the authorities that he deserves.