Seems that you answered your question in your post. His parents. But he is here so how are they blocking contact? Not a good idea for him legally if he is still a poi.
I believe they reached out several times this summer. After being rebuffed several times, they more than likely stopped. But why would his parents block contact? You could be right, and JW's attorney could have advised against contact because he is a POI. Really difficult for JW and CS and RS because they are all suffering and could be comforting to each other. Maybe the public comments by CS and RS are aimed at JW to let him know that they do not suspect him.