You are going round and round in inconsistent circles. Let's focus on just one point since you are having trouble. Here is your explanation: "The FBI finds fibers on the rifle, which they compare to the fibers of Oswald's arrest shirt and they find that the fibers are similar. Then they learn that various witnesses gave different descriptions of the shirt they saw Oswald wear on Friday morning, leaving them unable to argue that Oswald was wearing the same shirt all day (which btw is exactly what the WC later claimed)."
WHY for f's sake would the FBI need to demonstrate that "Oswald was wearing the same shirt all day"? If the evidentiary value from the FBI's perspective is that the fibers link Oswald's shirt to the rifle, they don't need to prove that Oswald wore the shirt that day. The fibers from that shirt could have gotten on the rifle on some prior occasion. There is absolutely no need for the FBI to coerce a witness to lie about the shirt Oswald was wearing on the bus. I can't simplify it any further. And the hilarious kicker, of course, is that the FBI didn't even suggest that the fibers proved that Oswald was wearing that particular shirt. The entire purpose of this exercise in your conspiracy fantasy.
WHY for f's sake would the FBI need to demonstrate that "Oswald was wearing the same shirt all day"? If the evidentiary value from the FBI's perspective is that the fibers link Oswald's shirt to the rifle, they don't need to prove that Oswald wore the shirt that day. Here's what you don't understand. Saying that fibers found on the rifle are similar to those of Oswald's shirt,
does not link Oswald's shirt to the rifle. What could have done that is a gunshot residue test on the shirt, but they never did that.
To link Oswald's shirt, in particular, to the rifle they needed something more, like for instance a witness stating that she saw Oswald wear that shirt on Friday morning.
The fibers from that shirt could have gotten on the rifle on some prior occasion. You keep saying that and it is still just as meaningless as the first time you said it. Nondescript fibers that are merely similar to those of Oswald's arrest shirt (of which there were probably thousands similar shirts) that got on the rifle at some other occasion is proof of absolutely nothing. It certainly doesn't put the rifle in Oswald's hands on 11/22/63 at 12:30 PM.
There is absolutely no need for the FBI to coerce a witness to lie about the shirt Oswald was wearing on the bus.Who said anything about coercing a witness? It's easy enough to influence a fragile old lady into believing she saw something she actually didn't see. But regardless, your disbelieve that the FBI would do something like that is belied by the fact that they actually did go to Bledsoe's house and showed her the shirt.
If, as you claim there was no need to do that, then why did they do it?
And the hilarious kicker, of course, is that the FBI didn't even suggest that the fibers proved that Oswald was wearing that particular shirt. Indeed, they left that conclusion to the WC, after they told them that the fibers found on the rifle were similar to those of the arrest shirt and after Bledsoe, in her completely incoherent testimony, gave them an opportunity to conclude that Oswald had been wearing the same shirt the whole day. In their report they actually said that Oswald had claimed that he had changed his shirt but that witness testimony proved that was not the case.
You clearly do not understand how these kind of games are played!