FBI closing in
BBC, 19 Dec 2001: For five weeks now (=Nov 14), the FBI has been working openly on the premise that the terrorist is home-grown. Last week it was acknowledged that the US military has in recent years been making weaponised anthrax, of a type that matches the anthrax used to lace the lethal letters.
The Atlantic, June, 2002: In November (2001), the FBI issued a suspect profile identifying the likely anthrax attacker as a single adult male, probably an American with a scientific background, lab experience, poor social skills, and a grudge. *
Some people - I - was one of them - viewed this interpretation with skepticism. What would be the motive? Why the timing so close to September 11? A number of analysts, including David Tell in a useful article in The Weekly Standard on April 29, have subsequently cast doubt on the disgruntled-scientist hypothesis,
* FBI (Mueller) suspected it was a homegrown scientist from beginning, knew from Nov 4.14.