When did Weitzman ever say it was a Weaver?
Don't know..... But I'd guess that he was referring to the mauser examination.....Because I doubt that he could have made that WAG at the time that Lt Day picked up the Carcano FROM THE FLOOR and held it up to Capt Fritz. I wish I could figger out what the reason that they gave Weitzman a mauser to examine and describe.
It's possible that the senile Fritz became confused when one of his detectives brought the Mauser in from ( the Daltex?) and thought that it was the carcano from the sixth floor......
You may recall that during the early stages of the investigation the authorities were telling reporters that Lee was the leader of a band of communists, so they may have thought that the mauser was the weapon of one of Lee's communist accomplices.