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. But you'd think at least that they'd allow the FBI to search for Natalee, send down divers. If they found anything, they could tag it and let Aruban divers take over. Or make sure Aruban LE divers are with the FBI teams, etc..
"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.