Anthrax spores don't match dead researcher's samples

Poisonous anthrax that killed five Americans in the weeks after the Sept. 11, 2001 terror attacks doesn't match bacteria from a flask linked to Bruce Ivins, the researcher who committed suicide after being implicated by the Federal Bureau of Investigation, a scientist said.

Spores used in the deadly mailings "share a chemical 'fingerprint' that is not found in the flask linked to Bruce Ivins," Roberta Kwok wrote in Nature News, citing Joseph Michael, a scientist at the Sandia National Laboratories in Albuquerque, New Mexico.