Alan, this makes the whole thing even more confusing.
The official story is that Lt Day took the palmprint of the rifle, at the DPD, but didn't process it completely because he was told to drop everything and turn the evidence over to the FBI, who subsequently found not prints or even residue of a print on the rifle.
If this is an accurate communication to SAC Dallas on the day of the assassination, at first glance, it seems to support the official story, but the last sentence
(Lt Day was at this time at the book despository and the gun was at the PD) actually destroys the official narrative.
As Walt pointed out is that Day left the TSBD with the rifle and he never returned to the building. So, what the hell is going on here?
Can you post the entire memo?