Do different post offices use different stamps? This determination sounds a little farfetched to me, but maybe it's possible. If so, I'm surprised that this information never came out until now.
The particular variety used in the anthrax attack has been replaced.
If they were putting track and trace materials in the paper it was a secret.
What I suspect is that there were no track and trace materials in the paper, but in the course of "discussing" the business with some cronie reporter the FBI informant got all mixed up on "all the envelopes came from Pennsylvania" ~ meaning the facility in Wilkes Barre ~ and got turned into "near Maryland or New Jersey" - since PA, after all, really is near MD and NJ.
So, what can I say ~ FBI guys are protecting their careers from a possible Obama regime, and reporters are stupid.
"He proceeded to describe to the group a very long and detailed homicidal plan and intention, that he had bought a vest, obtained a gun, a very detailed plan to kill his co-workers, because he was about to be indicted on capital murder charges," she added. "He was going to go out in a blaze of glory."Well, did the FBI find the vest and gun yet?