The FBI announced that it has concluded its investigation into the 2001 anthrax mailings, saying Friday that a biodefense researcher carried out the attacks alone.
The anthrax letters killed five people and sickened 17 shortly after the September 11, 2001, terrorist attacks. The letters, filled with bacterial spores, were sent to Senate Democratic leaders and news organizations.
"By 2007, investigators conclusively determined that a single spore-batch created and maintained by Dr. Bruce E. Ivins at the United States Army Medical Research Institute of Infectious Diseases (USAMRIID) was the parent material for the letter spores," said a report released Friday by the FBI.
"Evidence developed from that investigation established that Dr. Ivins, alone, mailed the anthrax letters."
The investigative summary and the attachments are now accessible to the public and have been posted to the Justice Department Web site at www.usdoj.gov/amerithrax under the Freedom of Information Act. In addition, roughly 2,700 pages of FBI documents related to the Amerithrax case are now accessible to the public and have been posted to the FBI website at http://foia.fbi.gov/foiaindex/amerithrax.htm under the Freedom of Information Act.