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Bruce Ivins, an Army scientist at Fort Detrick, Md., was branded the killer in the anthrax mailings. He committed suicide in 2008. | /William Hirt/MCT

Claire Fraser-Liggett, a genetics consultant whose work provided some of the most important science linking Bruce Ivins to the attack powder, said she would have voted to acquit. | /FRONTLINE/MCT

The Justice Department's lead federal prosecutor, Rachel Lieber, said she's confident a jury would have convicted Bruce Ivins. | /FRONTLINE/MCT

Special Report

FBI's case against anthrax suspect rife with questions

Newly available documents and testimony shed fresh light on the evidence against Bruce Ivins, the accused "anthrax killer" who committed suicide. While prosecutors continue to vehemently defend their case, some scientists wonder whether the real killer is still at large. » read more

Newly released files cloud FBI's anthrax finding

In early 2002, federal agents who were hunting the anthrax killer were trying to winnow a suspect list that numbered in the hundreds. They knew only that they were looking for someone with access to the rare Ames strain of anthrax used in research labs around the world. Profilers said the perpetrator probably was an American with "an agenda." » read more

Was FBI's science good enough to ID anthrax killer?

A look at the scientific aspects of the most expensive federal investigation in history shows that new, more powerful technologies already had overtaken the methods used to pinpoint the flask as the murder weapon when prosecutors revealed their case in August 2008. » read more