The problem for the DA is that they could run into trouble if they don't prosecute the abuser and he or she does something worse the next time. The problem for the victim is that they often do not want to testify, or if they do, they'll change their story, which is a potential perjury charge. This situation is terrible in so many ways.
As my colleague responded, find a local attorney who can advice you on the best course of action.
This does not create and attorney client relationship. As with all legal matters, you should contact an attorney in your jurisdiction who is familiar with the are of law in which you need assistance. You should make contact and seek advise as soon as possible as some claims have time limits and restrictions. Complete and accurate legal guidance cannot be guaranteed without a complete understanding of all aspects of your issue or potential claim.