March 23, 2011 Microbiologist Bruce Ivins' psychiatric history provided clues that should have been acted on before the 2001 attacks, a panel of experts says. Ivins, who investigators believe was responsible, killed himself in 2008.
February 15, 2011 The FBI and Justice Department overstated the certainty of the scientific evidence used to prove that Bruce Ivins carried out the anthrax mailings that killed five people in 2001, according to an independent panel of scientists. The panel limited its findings to the science and did not "assess the guilt or innocence of anyone" tied to the case.
February 15, 2011 Seven days after the terrorist attacks of Sept. 11, 2001 attacks, anonymous letters laced with deadly anthrax spores began arriving at media companies and congressional offices. Here, a chronology of who was infected and the FBI's pursuit of the attacker.
February 19, 2010 Officials planned to release new evidence Friday proving that Dr. Bruce Ivins, 62, mailed poison-laced letters to a handful of politicians and newspaper outlets — a finding the bureau advanced during its preliminary investigation more than a year ago. Five people died and 17 were sickened by the attacks.
August 19, 2008 The FBI has revealed new details about the scientific findings that led them to suspect Army scientist Bruce Ivins was responsible for the 2001 anthrax mailings that killed five people. Ivins committed suicide last month. The case against Ivins rests in part on a complex genetic technique.
August 11, 2008 Anthrax infections occur mostly in wild and domestic animals, which can breathe in the bacteria spores as they root around in the soil. Even then, anthrax infections are rare in the United States, and the disease isn't contagious. But even with treatment, the disease can be fatal.
August 10, 2008 Charles Ivins, the brother of an Army scientist who killed himself last month while under investigation by the FBI in connection with the anthrax killings in 2001, says "it is very hard for me to accept the idea that he would do something like that."
August 8, 2008 The DOJ says it's confident Army scientist Bruce Ivins sent the deadly anthrax letters in 2001. But Ivins' lawyer says dozens, if not hundreds, of scientists and contractors had access to those same anthrax spores. A detailed look at the government's allegations and Ivins' defense.
August 8, 2008 In his first sit-down interview about anthrax suspect Bruce E. Ivins, attorney Paul Kemp explains why he thinks the Justice Department's case against the late Army microbiologist is weak. Ivins, who committed suicide July 29, 2008, was a prime suspect in the 2001 anthrax mailings that killed five people. Read a transcript of the interview.
August 8, 2008 Read a transcript of the Aug. 6, 2008, news conference by U.S. Attorney Jeffrey Taylor, FBI Assistant Director Joseph Persichini and other officials to discuss the government's investigation of Bruce Ivins, an Army microbiologist suspected in the 2001 anthrax-letter attacks.
August 8, 2008 The U.S. government released evidence this week in its case against Bruce Ivins, who killed himself last month after he learned he would be charged in the 2001 anthrax mailing attacks. The prosecution presented its arguments in a news conference instead of a courtroom, which left Ivins' attorney, Paul Kemp, unsatisfied.