As someone recently said in these parts, "Never ascribe to incompetence what the be explained by willful manipulation."
I believe the detailed evidence is clear that the Cold Case Posse (CCP; irony noted) was made to back off a bigger story and accept feeble, completely adulterated results and explanations, even though the underlying correctness of Barry's LFBC being a total fraud is the proper view.
If Congress critters had done a thorough dive onto the Zullo results, the entire LFBC forces arrayed against Barry would have forever been discredited. Conservatives that sided with and funded Arpaio's CCP were very fortunate Zullo's grand final digest (12/2016) of LFBC fraud.
Several people feeding Zullo information were "compromised." At least five people closely involved in the scenario had at various times been in the employ of the CIA, USAID (a CIA front organization), or Indonesian CIA fronts.
Literally every one of the "9 points of Forgery" Zullo presented at his 12/2016 press conference, the purported culmination of the CCP's work were wrong. That cannot be coincidence.
(If there's interest, I could post more on a new thread without seeming to slide further, even though Q1429, Q31516, Q3517 and Q3518 are relevant.)
(I forgot to ping you to the above post as I had intended.)