Nearly 10 Years Later And The FBI Has No Real Idea Who Sent The Anthrax Letters Or It Knows But Won't Tell

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Dr. Zack, the real Anthrax hack?

It's a case that's been marked by controversy and mystery for nearly a decade: who was responsible for the deadly anthrax-laced letters sent after 9/11?

The cornerstone of the FBI case against Dr. Ivins was that the anthrax in the flask to which he had access -- labeled RMR-1029 -- had a unique make-up that identified it as the parent material for the anthrax in the attack letters.

The review by the NAS concludes that while the anthrax in the letters was "consistent with" the RMR-1029 flask, that flask was not the "immediate source" of the spores used in the letters.

The NAS found that one or more growth steps would have been required to produce the spores used in the letters.

The NAS found that "the data did not rule out other possible sources" of the anthrax.

In addition, the NAS found that the anthrax used in letters sent to New York locations -- including ABC News, NBC News and the New York Post -- had different physical properties from the anthrax in letters that killed several postal workers and closed down some Senate offices in Washington, D.C.

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The FBI knows of a man who was caught entering the lab where the Anthrax used in the letters was kept, after he had been fired for a racially motivated attack on a co-worker.

Dr. Philip Zack was the man caught entering the Anthrax storage area at Fort Detrick without authorization.


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Ivins said he knew identity of Anthrax killer

Bruce Ivins, the Army scientist accused of carrying out the 2001 anthrax attacks, e-mailed himself last year saying he knew who the killer was. According to an FBI affidavit, the e-mail was dated Sept. 2007.

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