Hi, I'd like to help you with your question.
You are allowed to tell others the experience you went through. But what you want to be aware of is that if you tell others this person's name, you are in essence accusing him publicly of a crime. If you do this and he finds out, he could accuse you of slander (check with your attorney on the legality of this).
What you want to do instead is contact the authorities. Talk to the police and let them know your concerns. They will be able to tell you whether or not you can warn others. If you are interested, you can also see if you can still pursue charges against this person. If you want to do that, you would have a better chance of making sure others find out what he has done, given that he is found guilty of the crime. He would have a criminal history and therefore not be allowed to work with children.
I hope this has helped you,
You are welcome! It is very thoughtful and caring of you, considering what you went through with this man, that you would think of others. I hope it all works out for you.