"When I see my son in two weeks, I plan on talking to him extensively away from the group setting. "
This sounds like a good plan. My advice to you is to take him off campus when you speak with him. This will reassure him that no one is listening in on your conversation, and will encourage him to fully open up to you. BCA staff will of course resist this idea, but he is your son, and they can't prevent you from taking him if you want to. I split form BCA several years ago in 2002. My own experience with BCA is that it is a HIGHLY ABUSIVE environment, and not theraputic at all. The experience did help me to grow up in some ways, but overall it
hurt me a lot more. I don't think I have PTSD, but I do still have occasional nightmares from that time. My advice is that you should take your kid out of BCA right away, and find him a good second chance boarding school ( one that focuses on academics, not behavior modification or emotional growth). Make sure that you listen to what your kid has to say. Be prepared to hear an earful. No matter how bad it sounds,remember that what he says is probably true. I hope this works out for you...But again, YOU SHOULD GET HIM OUT OF BCA AS SOON AS POSSIBLE!