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.