OK, here's my take on what went down - so far as possibilities.:
1. The usual Coast Guard safety inspection routine and they find contraband, i.e. stuff they shouldn't have, use your imagination, refrigerators, tv's, cars - so they panic and haul bellybutton out of dodge to prevent going through the usual crap of having the boat impounded again and bailing the Captain and everyone else out of the brig.
2. There was overfishing, knew it and were caught, panic'd with the CG guys still on, something went down - and hauled bellybutton out to sea anyway b/c of what went down and the usual blamegame ensues.
3. The same political bs played out again about economic exclusion zones and one party recognizing the rights of another's right to use those economic resources.
- Laws are only as effective as those enforcing them - and treaty's are the same way when methods of verification and compliance are effective.