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

I want you to notice something about the figure we have designated as Joe Molina in the Altgens photo. 

Notice that his thumb is separated from the rest of his fingers. Why would he hold one hand like that? Why would he hold one arm only across his chest? Doesn't it look like he is grabbing his other elbow with that hand? Try it yourself. You'll see that your hand naturally falls the same way his does when you try to grasp your other elbow. The way he has got his hand arranged is giving that away. 

I strongly suspect he is leaning back against the median handrail with both arms folded across his chest.