Guaranteed scam, the poor slob is Brooklyn is being paid to redirect packages elsewhere, probably overseas; odds are he'll end up getting burned too. Such scammers are even using very convincing (but fake) Postal Money Orders so their victims think there's no way it could be a scam, but it is.
I'd take this to the police fraud squad, or if the Postal Service is involved to the Postal Inspector. At least they can have the cops in Brooklyn alert the re-shipper he is unwittingly being used in a criminal enterprise.