Dan, I think that some of your words could be better selected. It wasn’t that Day said that he could not make a positive ID. But rather that he hadn’t yet spent enough time on it to say for certain one way or the other. He believed that it was a match based on his preliminary comparison. But it would have taken him some significant more time to be able to document everything so that he could say for certain that he had enough similarities to satisfy the requirements for certainty. Sadly, he was told to stop the processing that he was in the middle of.
So what was stopping him? He already (supposedly) had the lift and didn’t turn it over. He had days to continue examining it. If Savage is to be believed, everybody else in the office did on Saturday.The “didn’t have time” excuse falls flat when you consider that he “had time” to photograph and cover the trigger guard prints and Drain didn’t pick up the evidence until after midnight. Day was processing the rifle hours earlier.
I think that there was a very faint print left on the underside of the barrel. And that the FBI probably just missed seeing it.
Once Latona got the lift on the index card, he knew exactly where the print had supposedly been. He said there was nothing there.
Now if Latona had been told there was a print under the fore stock and still couldn’t find it, you might have a point. Sadly, Latona had no way of knowing to look for anything under the fore stock because Day only verbally told Drain and Drain failed to make it known to Latona.
But Day didn’t tell Drain.
Now, remember that the FBI did later scientifically confirm that the print was lifted from where Day said he lifted it. This can be viewed as a concession (without Latona having to admit it) that they missed what was left on the barrel.
All we have is a letter from J. Edgar (to the rescue), and an indistinct smudge. There’s nothing scientific about it.