I can't understand how anyone can think Tomlinson (or Wright) could positively identify that bullet. He finds a bullet on a stretcher, gives to the chief security officer at the hospital (Wright), and then is shown a bullet months later. How can he say it's the same bullet? All he can say is it "looks" the same. It's impossible to identify it. Not positively identifying it is not "refusing" anything.
In 1966, Tomlinson was interviewed by a private researcher (Raymond Marcus) who asked him about the bullet. Here, in part, is what he said.
Marcus: Did anybody show you the bullet after the time you found it, and after the time you gave it to Mr. Wright?
Tomlinson: I seen it one time after that. I believe Mr. Shanklin from the FBI had it out there at the hospital in personnel with Mr. Wright there when they called me in.
Marcus: When Shanklin and Mr. Wright called you in at that time, did they show you the bullet?
Tomlinson: Yes.
Marcus: Did they ask you if it looked like the same one?
Tomlinson: Yes, I believe they did.
Marcus: And as far as you could tell--- of course, you weren't making a ballistics test of it--- but as far as you could tell, did it look like the same one to you?
Tomlinson:
Yes, it appeared to be the same one."Appeared to be the same one." What more could Tomlinson say? As he admitted in the interview, he only "glanced" at it before giving it to Wright.
Is this evidence for that bullet? It is to me. Proof? No. Strong evidence? No. But certainly evidence. Can I prove this discussion took place? No. Can I prove he saw the same bullet, that it wasn't switched? No.
The complete Marcus/Tomlinson interview is here:
https://jfk-archives.blogspot.com/2011/12/marcus-tomlinson-interview-7-25-66.html