W.O.W., I am extremely happy that he is B”H OK. On the other hand I do understand your hurt and frustration and I will not even attempt to minimize it one iota. It is what it is and you are entitled to your feelings. It hurts and it hurts badly.
Speaking to the R”Y is not a bad idea, although I doubt he will do anything or admit to any wrong doing. However, advocating for your child and letting him know from your perspective and from his what he did and what the result of that is will at least help you and maybe other children. In addition it will mean something to your child that you had the guts to go back to the R”Y and tell him that he was wrong, he hurt your child, and that he owes him an apology. Standing up for your child is always the right thing to do.