I highly doubt it. I think the texts with the mosque guy are a red herring here, they're the type of thing that's bound to look suspicious at first glance given the nature of the crime, but looked at close up the suspicion dissolves. They were sent over the course of 16 days, during which the mosque guy was trying to arrange who brought what to the muslim equivalent of a Christmas party, or New Year's party.
I think mosque guy is being falsely implicated here. Look to the money order and the internet connections would be my gut feeling. The poor guy at the local mosque is probably torn between horror at what one of his congregation has just done, and fear that he's about to be shipped off to Guantanamo Bay.
Half joking, half not. Had a friend who was hired by a prosecutor to translate taped phone convos between two Russian mobsters. They used letters like ABCD to discuss "shipments" and such of drugs, money, etc., or so that was what the prosecutor said. The mobsters CLAIMED that one of them was having problems with his son not being a good student, and they were discussing his grades!