A report from McClatchy provides important new evidence and analysis in the FBI’s Amerithrax investigation of the 2001 anthrax attacks. The report shows that the FBI ignored as potentially erroneous a measurement of silicon in one anthrax sample and then hid this information from Congressman Jerrold Nadler (D-NY). Even more importantly, the high silicon measurements in at least two samples also were coupled with high tin measurements, opening up the possibility that silicon was added to the attack material in a form that is not mentioned in any of the FBI documents.

Significantly, it is virtually impossible that Bruce Ivins, whom the FBI has concluded acted on his own to carry out the attacks, would have been able to perform the necessary chemical manipulations involved in this treatment of the spores. Ivins likely also would not have had access to the necessary laboratory equipment to perform this treatment.

It seems very likely to me that had Bruce Ivins not died, the analysis carried out by a panel from the National Academy of Sciences in assessing the scientific evidence tying Ivins to the 2001 anthrax attacks would have led to reasonable doubt on whether Ivins carried out the attacks. For this post, let us concentrate only on the NAS response to FBI claims on the spores used in the attack, especially with regard to how the spores were prepared.

Both the New York Times and McClatchy report that Congressman Rush Holt (D-NJ) has written a letter to the FBI, blasting them for requesting a delay in the release of the final report from the National Academy of Sciences panel that has been reviewing the scientific analyses used in the FBI’s Amerithrax Investigation of the 2001 Anthrax mailings. It appears that in requesting the National Academies to delay release of its final report, the FBI has released an additional 500 pages of documents to the panel, but only after having seen the draft final report from the panel.