Okay always helps to have a realist to work with. Give us your best scenerio, include the reasons for the apparent order they went to the restroom. The contents of the "full" mcdonalds bag location. ( marshalls checked the garbage and there was nothing in it. SO.... give it a shot would enjoy hearing your insights.
Maybe the guy went into the restroom to eat lunch so he wouldn't have to share it with the other guys? But someone should have confronted them at some point after the flight and found out what the answers were. Hopefully someone did.
I kind of imagine the FBI or Homeland Security checked all of this out and are working a case where these guys are involved, so now they're tight lipped about it. We'll only hear about it if the AG files on someone.