You're quoted:
"So he sent a warning to the media, saying this is next, there's a biological attack coming next, and be prepared: Take penicillin," said Lake..."
I also believe the mailer/s had a familiarity with Central New Jersey. Because the return addresses on the second batch nearly match a name of a school there and the town didn't match the zip code, town was adjacent or so to the zip code area - only someone from local familiarity would know enough to make that kind of mistake. If the mailer was from elsewhere but wanted to make a phoney return address they would look up the town's name on the internet or such and have the correct zipcode - no reason to dummy the zip code.
"So he sent a warning to the media, saying this is next, there's a biological attack coming next, and be prepared: Take penicillin," said Lake..."
Yes, I know. This article is taken from a news service. The actual article was printed in the Newark New Jersey Star-Ledger on October 9.
Ed