If everything I've read about postal inspectors is even half true the whole crew is in for a load of trouble.
No statute of limitations, so if they convict and find the card being sold by one of them later they can apply other charges. Plus they refer stuff outside jurisdiction to the appropriate authority. And unlike a complaint from a regular person that might not get as much effort in investigation info from the POD gets taken care of.
He might not be out for some time
Steve B