Army scientist Bruce Ivins is the sole person responsible for the 2001 anthrax attacks, and he had custody of highly purified anthrax spores with "certain genetic mutations identical" to the poison that killed five people, the Justice Department says. Ivins was unable to give investigators "an adequate explanation for his late laboratory work hours around the time of" the attacks, and he apparently sought to mislead investigators, according to an affidavit.
The 62-year-old scientist committed suicide last week as investigators were preparing to charge him with murder. Officially, the case will stay open for an undetermined but short period of time. That will allow the government to complete several legal and investigatory matters that need to be wrapped up before it can be closed, the officials said.