Ever since the FBI claimed (for a second time) that it had discovered in 2008 the identity of the anthrax attacker -- the recently-deceased-by-suicide Army researcher Bruce Ivins -- it was glaringly obvious, as I documented many times, that the case against him was exceedingly weak, unpersuasive and full of gaping logical, scientific, and evidentiary holes.  So dubious are the FBI's claims that serious doubt has been raised and independent investigations demanded not by marginalized websites devoted to questioning all government claims, but rather, by the nation's most mainstream, establishment venues, ones that instinctively believe and defend such claims -- including the editorial pages of the nation's largest newspapers, leading scientific journals, the nation's preeminent science officials, and key politicians from both parties (led by those whose districts, or offices, were most affected by the attacks).  To get a sense for the breadth and depth of the establishment skepticism about Ivins' guilt, just click on some of those links.

Since that initial wave of doubt, the FBI's case against Ivins has continuously deteriorated even further.  In February of this year, a panel of the National Academy of Sciences released its findings solely regarding the bureau's alleged scientific evidence (independent investigations of the full case against Ivins have been successfully blocked by the Obama administration), and found -- as The New York Times put it -- that "the bureau overstated the strength of genetic analysis linking the mailed anthrax to a supply kept by" Ivins; the Washington Post headline summarized the impact of those findings: "Anthrax report casts doubt on scientific evidence in FBI case against Bruce Ivins." 

But the biggest blow yet to the FBI's case has just occurred as the result of an amazing discovery by PBS' Frontline, which is working on a documentary about the case with McClatchy and ProPublica: