Does anyone know how to relinquish a child you adopted from the Ukraine?

We have a friend that has a biological daughter and adopted son from Ukraine. Their adopted son's extremely bad behavior including trying to burn down their house and other dangerous activities caused them to place him in a therapeutic boarding school. He will never be able to come home or live independently, but the family does visit him at the school. This is one way to handle the situation. I read recently about an adoption agency that specializes in re-homing. As for myself, I could never relinquish my child adopted or not. Not being in the situation, I could not judge. I will try to get the information about the re-homing agency.