I was always told that if a person can get into your property they will get into your property. I should think that if someone was able to get into WHF they would be able to get out without any kind of trick such as banging a window so it would shut after them. Especially if they knew that house and had lived in it for years. In other words it is so obvious and everyone knew about it that it didn't need a robin to tell them about it. Again because it was so obvious and even commented on by JB himself that I doubt very much that he did actually get out of the house by that said window. Much ado about nothing if you ask me. Too much is being made and was made about this window that I personally believe it is another red herring?