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Buried in FBI laboratory reports about the anthrax mail attacks that killed five people in 2001 is data suggesting that a chemical may have been added to try to heighten the powder's potency, a move that some experts say exceeded the expertise of the presumed killer. The lab data, contained in more than 9,000 pages of files that emerged a year after the Justice Department closed its inquiry and condemned the late Army microbiologist Bruce Ivins as the perpetrator, shows unusual levels of silicon and tin in anthrax powder from two of the five letters. Those elements are found in...

The investigation of the 2001 anthrax attacks ended as far as the public knew on July 29, 2008, with the death of Bruce Ivins, a senior biodefense researcher at the U.S. Army Medical Research Institute of infectious Diseases (USAMRIID) in Fort Detrick, Md. The cause of death was an overdose of the painkiller Tylenol. No autopsy was performed, and there was no suicide note.

Jean Duley testified that she was "scared to death" of Bruce Ivins after he left her a string of harassing phone messages, according to an audio recording taken during a July 24 peace order hearing. Duley, 45, told Judge Milnor Roberts that Ivins planned to "go out in a blaze of glory," had bought a bulletproof vest and a gun and planned to kill his co-workers. The audio recording was obtained by The Frederick News-Post on Monday. Duley told the court she got to know Ivins while running group and individual counseling sessions at the Comprehensive Counseling Associates in Frederick...

The vast anthrax investigation, code-named Amerithrax, ended as far as the public knew on July 29 2008 with the death of Dr. Bruce Ivins, a microbiologist/wiki/Biodefense at the United States Army Medical Research Institute of Infectious Diseases in Fort Detrick, Maryland, at the nearby Frederick Memorial Hospital. The proximate cause of death was an overdose of the pain-killer Tylenol. No autopsy was performed, and there was no suicide note. Less than a week after his apparent suicide, the FBI declared Dr. Ivins to have been the sole perpetrator of the 2001 Anthrax attacks, and the person who mailed deadly anthrax...

One of the nation’s top biodefense researchers has died in Maryland from an apparent suicide, just as the Justice Department was to file criminal charges against him in the anthrax mailing assaults of 2001 that killed five, the Los Angeles Times has learned.Bruce E. Ivins, 62, who for the past 18 years worked at the government’s elite biodefense research laboratories at Fort Detrick, Md., had been informed of the impending prosecution, people familiar with Ivins, his suspicious death and with the FBI investigation said.Ivins’ name had not been disclosed publicly as a suspect in the case that disrupted mail service...