Hmmm There is something missing in all of this. If it is cutaneous anthrax, why just this guy? This certainly is a drip drip drip psyops torture thing if it is anthrax.
My theory for this incident, if it involves Anthrax at all, was that it was NOT targeted. Instead, some junk mail fliers or other mail passed through the contaminated facility in Maryland or New Jersey on its way here and a 'spot' of it was placed on the mail. Later, when our local victim made a stack of them ready for the garbage, he loaded them up in his arms and carried them to the trash. Out of that bundle spilled or otherwise came the contaminant, lodging on his arm.
Lieutenant Columbo I ain't, but I'd bet anything that if this is anthrax, it arrived here as a 'smudge' leftover from elsewhere--an accidental tourist, so to speak.