<p>I think you have handled it well as has your son. I think it is very good that the hall director entered the room on a ruse and happened to discover the knife while there. I also think it is good that your son made it known that he wanted to be on the same floor as his friends all along and that he was able to get an opening from housing as he had wanted. That is better than it coming across that he moved out over this kid or told anyone about the roomie. So, that helps.</p>
<p>I agree that the boy/roomie may not be violent but ya never know, and yes, you are right that he needs help and perhaps your alerting higher ups at school will allow that to happen, hopefully.</p>