Now you're playing Bill Brown word games. You misrepresented the truth by leaving out the part of the quote that undermines your argument.
"Frazier said that it was possible this was the case, but he did not think it resembled it."
That's right. Frazier definitely did not see Oswald carrying a bag covered in fingerprint powder.
A lot of 'could haves' in this case. Or in other words 'cannot totally dismiss'