Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

That potential Bookhout figure does seem to be wearing his Fedora hat rather low on his head. I made this comparison to Sinatra.

 Look how close the rim of his hat is to his right eyebrow on our left. So, is he hiding under that hat? And is it because he's James Bookhout?