Craig exhibited mental problem later on but never wavered from his original stance on the Mauser as the weapon.
Of course you're right....
"Craig never wavered from his original stance on the Mauser as the weapon." But that simply means that in his ( sick) mind that it was the truth. But if you'll review the 15 minute period from the discovery of the CARCANO until Lt Day picks the carcano
UP FROM THE FLOOR there should be no doubt in your mind that Roger Craig was a liar.....and there was no mauser there.