While I would take anything the FBI says with a grain of salt, bear in mind that this copier contamination may have been very, very light. It's seems almost certain that the anthrax letter was opened, based on the pattern of exposure, which would make it odd if the real letter was completely unremembered. The more important question is how Bob Stevens received a lethal bolus, and how his keyboard came to be contaminated. That strongly suggests -- but does not prove -- that he was directly exposed to the opened letter. All of which is, again, consistent with the J-Lo letter being the likely source of the exposure, just as the New England Journal of Medicine reported last November.