The home of Bruce E. Ivins, 62, who died Tuesday of an apparent overdose of prescription Tylenol mixed with codeine, is shown, Friday, Aug. 1, 2008, in Frederick, Md. Ivins, a top U.S. biodefense researcher who, according to his brother, was being aggressively pursued by the FBI in connection with a series of anthrax mailings after the Sept. 11, 2001 terrorist attacks apparently committed suicide. AP Photo logo AP Photo 11 months ago

The home of Bruce E. Ivins, 62, who died Tuesday of an apparent overdose of prescription Tylenol mixed with codeine, is shown, Friday, Aug. 1, 2008, in Frederick, Md. Ivins, a top U.S. biodefense researcher who, according to his brother, was being aggressively pursued by the FBI in connection with a series of anthrax mailings after the Sept. 11, 2001 terrorist attacks apparently committed suicide.