I have been a close friend of Dr. Bruce Ivins for years. The FBI needed a scapegoat, especially after Stephen Hatfill, whose foot the FBI ran over, won a $5.2 M lawsuit against them.
The new FBI director needed a capture in this case. So, they took all of the Ft. Detrick anthrax researchers and put them under intense interrogation.
Bruce was a mild, meek and sensitive scientist. The FBI showed his clinically depressed daughter, who was institutionalized in a mental hospital, photos of the anthrax victims, and said "your father did this." They offered his son $2.5 M and a sportscar if he would "rat" on his father.
Bruce could not stand stand up to the constant harrasment by the FBI. So we have lost a very talented researcher, so that the FBI can close the case...