I believe Mark may have been in Rampton Hospital I knew Mark when I was a child/teen and remember talking to him shortly before the tragic event in Central Park and he said to me that he was frightened that he was going to do something that would put him away for a long time as he was finding it hard to cope on the outside . I believe his younger brother also went to prison for manslaughter not definite about this but possibly true.I also heard one of them may have passed away inside ,which one I am not sure .