Maybe the FAA should pull his licence. If they fail to act on reports of criminal activities by someone holding one of their licences, then clearly there is something wrong with the system.
Not sure how the FAA could come into play here. In the end he's (allegedly) committing fraud, not reckless flying so it's more a contract terms violation or worse but not a breach of flight regulations. Then it's interesting how the can of worms opens when the airframes reach EU and never in US...
Just wondering how you got to hear about the latest victim, and if you can tell us more?
For those who haven't done it yet, you may want to join the AIRCRAFT FERRY group on FB. Some trustworthy chaps and companies there, worth loads of information.
Best luck the all owners!