AND NOW FOR SOMETHING COMPLETELY DIFFERENT

[Chris Bristow]

THIS IS A NUTSO THEORY JUST FOR THE FUN OF IT.
Lets say Oswald did the deed. To have a way out if caught he devises a plan. He creates the backyard photos but takes a copy of his head from the photo and pastes it onto another copy of the same photo. All elements of the background and Oswald would be a perfect match except for where the edge of his pasted head meets the background. He places the photo in the Paine garage and goes to work planning to do the deed. If he gets clean away with it he just destroys the photo the next day. But if the cops get onto him he will be arrested and the garage searched. They find the photo of him holding the Carcano and it becomes a centerpiece for the prosecution in the trial.
  Oswald then claims it is a forgery during the trial and asks for it to analyzed. The results show the photo is a cut and paste of his head, Someone has set this boy up! Who would be suspected? Well the cops had the chain of custody and the prosecution made a big deal of it so the jury would consider the cops or prosecutors to be the main suspects. Serious reasonable doubt is established and Oswald walks.