The more I focus on this, the more it looks to me, like a gentleman from the days of "Gunsmoke", where he has on a vest, a jacket over it that goes down to his knees (kind of like the duck tail tuxedos), and is either posing with his hand in front of him, or else it's his shirt peeking out from underneath the vest. He's wearing glasses, and has his hair parted to the side.
Exactly - that is what I see...one of those "old timey" photos. Could be a current one made to look old, or actually an old one. It doesn't seem to be superimposed on the crime scene photo because it is partially covered by the book. If super-imposed during exposure or something - it would also be on top of the book - and I don't see that. I am not saying it is related to Caylee or the Anthony's, because it could just be random trash.
And FloridaKatz - I give you 100% credit! I was not claiming to have spotted it myself...just commenting on what it looked like to me. You have a good eye, because I didn't see it originally.