I’m almost certain that Oswald was telling the truth when he stated that the photo was a fabrication with his head superimposed on the body of another individual and that he could prove how it was done.
Nonsense.
A panel of experts for the HSCA examined each of the backyard photos, including a first-generation print and one negative that was recovered.
The negative was unaltered and was proven to have been taken with the Oswald's Imperial Reflex camera to the exclusion of ALL OTHER CAMERAS.
Here is their analysis of the backyard photos.
https://www.history-matters.com/archive/jfk/hsca/reportvols/vol6/html/HSCA_Vol6_0077a.htm
The photo is of Oswald and he's holding the murder weapon in his hands. Furthermore, he signed one of the prints and that signature was matched to him by handwriting experts.
So now we have proof that Oswald possessed the murder weapon in March of 1963.