Actually Frazier did change his story. He went from 'I didn't pay too much attention' and estimating a rough size, to being adamant about the size. A nice guy he may well be but he has embellished his story. He didn't know Oswald contrary to what he says now.
Buell Frazier was just a nineteen year old kid, naive and honest....
He knew without any doubt that CE 142 was NOT the bag that he had seen Lee Oswald carry that rainy morning.
It's a simple as that.....Lee could not have transported that carcano in the bag that Frazier saw.
It's always been a mystery to me
WHY the DPD was so insistent in saying that Lee had transported that rifle in a paper sack that morning.....
WHY?
If it was Lee Oswald's rifle ....why were they desperate to make it appear that he had brought it into the building that morning? There's no reason that he couldn't have brought it into the building at some prior time.
Lee knew how to get around the area by using public transportation....He could have gone to the Paine's garage late at night and took the rifle and then smuggled it into the TSBD prior to 11/22/63....but the DPD was adamant that he had transported the rifle in Frazier's car that morning. WHY?
I strongly suspect that Lee inadvertently screwed up their plans to frame him by going to Irving on Thursday. The DPD and Hoover's "Extra Special" Special Agents were in panic when Lee told the interrogators that he had seen (
this)
"rifle and two other rifles outside Mr Truly's office on the first floor of the TSBD the day before yesterday" That statement put the rifle in the building 48 hours before the murder..... And in the hands of Mr Roy Truly.
They simply could not allow that information to become public....Thus they were desperate to make it appear that Lee had carried the rifle into the building that morning.