Garbage. There is no clean chain of custody anywhere in this case.
You're full of beans.
It's clean enough for reasonable people, but not, of course, for tinfoil-hat conspiracy theorists who believe the assassination was a conspiracy by the evil, evil CIA or the evil, evil [fill in the blank] and therefore oodles and gobs of bad guys and bad gals must have been involved in the planning, the "patsy-ing," the shooting, and the all-important cover-up.