"Fox news had an ex-FBI man on who's talked to the FBI down there, and they said they offered to help in any way, and Aruba has turned them down. It may be that Aruban LE is afraid foreign law enforcement help might compromise a case if they get enough evidence to hold a trial."
Just my opinion but I think it's a little more nasty then that. There was a tidbit going across the ticker on FOX yesterday (at this time) that said that a letter was sent to the Prime Minister and someone had responded that the FBI just cannot go around or come in and start dictating the terms of the investigation.
I remember something on Fox about Sen. Shelby sending a letter to someone...the Dutch ambassador, maybe.