Hello my friend,
I do not have a recommendation of a local counselor there, but I do recommend you seek the almighty counselor, the one who is full of truth and light. You can find an answer to EVERY problem ever faced in life in the pages of your Bible.
Pray for the Lord to send you a prayer partner, someone who can pray for you and with you. It is healing. Someone who has GOOD command of the scriptures and fills thier prayers, not with human words, but scripture- and repeats the scriptural promises in the Bible. It is a healing salve.
God loves you. He can empathize with you, for he also knows the pain of seeing a child hurt. His only son was tortured, spat on, ridiculed, and flogged so badly that the Bible says he was unrecognizable as a man, and then he was murdered. God has compassion for you, my freind.
If you do go to a 'Christian counselor', Watch thier words to see if their message is filled with the truths in the Bible, or if they mostly use human words and the current thought processes of the day. There are many counselors who claim to be Christian and the only way they bring God into the mix is in a prayer at the end of the session! Every word should hang on scripture and truth, every opinion backed up with a scripture to support it.
I'm so sorry for the pain this event has caused you and your kids. No child should ever have to be subjected to such evil. But we live in a fallen world, and we all will experience different facets of evil in our lifetime. Help your children forgive this man, not for his sake, but for theirs, so they can move on. For the younger one, I would not delve into too much heavy counseling, which might in effect make him feel a sense of self guilt that he currently doesn't feel. I think just to know that the man was in great sin against him and wrong to do what he did, and that no matter what God loves them unconditionally. To forgive.. and then to move on. I dunno, just thinking here.
With Love and prayers for your family,
Gail