He was given anthrax and perhaps more biochems of various grades. They may have been made in Iraq they may have been made here. He did not develop them himself. He knows lab procedures.
He is fairly diligent in handling the anthrax, but he is not perfect. He knows Dr. Malik, chairman of the Islamic Society of NJ. He may work with him. Hes been to the doctors office at 1542 Kuser Road in Trenton NJ. While there he accidentally infected the accountant next door at Civale Silvestri & Alfieri CPA, 1540 Kuser Road.
The perp may be from Pakistan and may have sought out Dr. Maliks help (because he is also from Pakistan) to get employment/access to a nearby university hospital, Robert Wood Johnson University Hospital at Hamilton. Dr Malik is on the staff there. The perp may have used lab facilities in the hospital to safely handle or prep the different batches of anthrax.
There probably are other people in his cell who may already be in custody - one with Florida license plates and others from Canada.
The perp accidentally infected the lady in New York. He did not go there by subway he drove in. He may have gone to New York to pick up or deliver the anthrax. The car he used is most likely still contaminated. He may have rolled down a window or opened a door at just the wrong time for Nancy.
He is a member or attendee of The Islamic Society of Central Jersey. He has written many letters to them; he knows the zip code by heart. Although he gave a different town name on the return address (Franklin Park) he automatically used the zip code he knew for that area. But the zip code does not go with Franklin Park.
There are probably canceled checks or correspondence at the Islamic Society of NJ that can be matched to his handwriting.
He is a member of Islamic student associations. He may have attended or be in association with a student at ETSU which is near an elementary school named Greendale. He didnt grab that name out of the air neither brook nor dale would be common words to him.
If he is Al Queda, he may present himself secular going to bars, joining clubs, protesting the terrorists, etc.
He may be dead or missing.