I'm Kind Of Confused

So, the FBI wants me to believe that the research center used by the US Army to research (and weaponize) some of the world's most awful diseases is the kind of place where a guy who is on anti-psychotic medication and having paranoid or dissociative feelings is allowed to work alone at all hours, with access to the equipment to create a highly sophisticated dry particle form of anthrax at a time of widely hightened security following the most traumatic attack on the nation in a generation?

And they further want me to believe that, even though this guy, who was actually an anthrax vaccine researcher, was doing all this weird stuff like mailing packages under assumed names, and traveling to visit sorority houses, the FBI spent time focussed on another guy completely, to the point where the Attorney General mentioned that other guy in a press conference, though now we know that guy was nearly six-million-dollars worth of not the right guy?

About the only thing that I find plausible about the case I've heard against Bruce Ivins is that the FBI knew from the earliest days that the anthrax came from Ft. Detrick, but didn't think it was their business to mention that fact while half of Washington, including the President and Secretary of State, were talking as if Iraq was the source. That sounds like Washington, DC to me.