The NIS investigation appears to have only looked into Marines. See Stolen Valor p. 133, bottom third. Apparently Sen. Mark Hatfield asked the Commandant of the Marine Corps to look into the Marine "atrocities" Kerry's phonies claimed. The VVAW leadership - that would be Kerry -- ordered the rank and file not to cooperate. SV in turn cites Gunter Lewy's America in Vietnam for the NIS story. Supposedly it's on p. 317 of that book. A direct quote from Lewy (SV p. 134, top): "But the most damaging finding consisted of the sworn statements of several veterans, corroborated by witnesses, that they had in fact not attended the hearing in Detroit. One of them had never been to Detroit in his life."
And further down SV p. 134, another Lewy quote: "The VVAW's use of fake witnesses...."
d.o.l.
Criminal Number 18F
I don't have it handy, but I've read a couple of times that Lewy read the NIS investigation but now can't locate it. I got the idea of a clerical error, and the Navy wants to find it but can't. You've heard different - a privacy dodge.
As far as I know from just clicking on the Web, the witnesses in the WSI itself stand untouched.
Doesn't seem likely, but I don't know how to rebut those that say "prove it".