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

So, anyone who maintains Oswald innocence MUST, by logical necessity, maintain that the Backyard photos were faked. That's because you can't have Oswald brandishing the murder weapon six months before the crime if he was innocent. 

But, if those photos were faked, then it means that they had the mindset to alter photos even BEFORE the assassination. And if they had that mindset before the assassination, then how could they not be prepared to do it AFTER the assassination? 

So, the very existence of the Backyard photos proves that the plotters were prepared to alter photos on 11/22/63. 

And, I think it's very likely that the very same team that altered the Backyard photos altered the Altgens photo.