IIRC, Corsi had an operative in HI, a detective with a Japanese-origin name, who in turn had a contact in HDOH who first said there was no LFBC, and then in April 2011 right before Corsi’s book was to come out, tipped off Corsi and Farrah that a forged LFBC was being prepared to derail the book.
Corsi and Farrah have repeatedly told how they discussed whether the book should be pulled and the title changed after Barry “released” (non-released) the .pdf image, but decided against it just to reinforce their knowledge that the “real” LFBC was still missing.
If Corsi could arrange a deposition of that HDOH witness by Zullo, the witness who knew there was no original and also there was a forgery being prepared, it could be explosive.
Here's hoping!
Also I note the AZ AG saying IIRC that in the normal course of events, if probable cause of a forgery or forgeries had been found Arpaio would bring the evidence to the Maricopa AG to file charges...which has not happened, yet, but is the elephant in the room, IMO.
Also Tim Adams the former elections clerk could provide leads to Zullo on who to interview.