What a horrible thing to suffer at the hands of someone you called friend. I can imagine that this hurts more than just some random trouble maker attacking you but you should be commended for not bringing his name out in the open.  It shows the kind of person that you are because you thought of his wife and children and how this man's behavior could impact them.  Hopefully he will recognize the kind of man YOU are and regret the loss of a good and decent friend.  Kudos to you!