For all the ways the September 11 attacks continue to shape US culture and foreign policy, the event is still shrouded in a surprising amount of mystery. A recently unearthed bombshell court filing offers some possible clarity on the questions that continue to surround the attacks and their aftermath — and yet, like similar bombshells in recent years, it’s been studiously ignored by the media and political establishment.

First reported by Rolling Stone contributing editor Seth Hettena on the Substack SpyTalk, the media project run by veteran former Newsweek national security reporter Jeff Stein, those potential answers come in the form of a signed affidavit from Guantanamo military commission investigator Don Canestraro. The affidavit outlines the findings of a 2016 investigation by Canestraro, a longtime veteran of the Drug Enforcement Administration (DEA), into Saudi and CIA complicity in the terrorist attacks, findings that are squarely at odds with the story given to the public in their wake.

Relaying the information gathered from dozens of interviews he conducted with former FBI and CIA personnel, members of the 9/11 Commission, and US government officials, Canestraro’s affidavit outlines a sequence of events that, if true, suggest a botched and illegal domestic CIA operation was at the heart of the intelligence failure that enabled the attacks. More than that, it suggests there was a concerted cover-up of the grave blunder after the fact by both the CIA and the George W. Bush administration.