FREDERICK, Md., Sept. 28 (UPI) -- A U.S. Army researcher found dead before formal charges were filed against him for the 2001 anthrax attacks left no suicide note, officials said.

WASHINGTON, Sept. 25 (UPI) -- Suspected Washington anthrax killer Bruce Ivins claimed to have solved the case in an e-mail message to himself, newly released court documents say.

WASHINGTON, Sept. 16 (UPI) -- FBI Director Robert Mueller said Tuesday an independent review would be conducted on the scientific evidence in the Washington anthrax attacks of 2001.

WASHINGTON, Sept. 7 (UPI) -- Significant doubt remains about the FBI's conclusions that U.S. Army scientist Bruce Ivins was the long-sought anthrax killer, skeptics say.

PALM BEACH, Fla., Aug. 17 (UPI) -- Reports of mental illness suffered by a U.S. anthrax researcher have boosted the outlook for a Florida attorney suing the federal government.

WASHINGTON, Aug. 15 (UPI) -- U.S. agents in the 2001 anthrax mailings missed or ignored clues pointing to the man they eventually said was the suspect, a review of records indicates.

WASHINGTON, Aug. 14 (UPI) -- Hair recovered from a mailbox in Princeton, N.J., doesn't match the lead suspect in the deadly 2001 anthrax attacks, federal investigators said.

WASHINGTON, Aug. 11 (UPI) -- A Washington legal expert says the government may have to pay millions of dollars in negligence claims due to the anthrax case against scientist Bruce Ivins.

WASHINGTON, Aug. 8 (UPI) -- The U.S. Justice Department said Friday that Steven Hatfill was not involved in anthrax mailings for which he was listed six years ago as a person of interest.