The story

A federal prosecutor formally declared Army biological researcher Bruce Ivins the sole person responsible for creating and mailing the bacterial spores that killed five people in the 2001 anthrax attacks.

"We believe, based on the evidence we collected, that we could prove his guilt to a jury beyond a reasonable doubt," Jeffrey Taylor, the U.S. attorney for the District of Columbia, told reporters at a news conference Wednesday afternoon.

Taylor presented an overview of the case against Ivins, 62, after the Justice Department released documents detailing the scientist's role in what Taylor called "the worst act of bioterrorism in U.S. history." Read full article »

CNN Producer Kevin Bohn, Bill Mears and Eric Fiegel contributed to this report.

All About AnthraxBruce IvinsFederal Bureau of Investigation

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