Murders often turn into purported suicides when the truth is less convenient.
Here's something from Dan Riehl as of June 19:
http://www.legendgames.net/showstory.asp?page=blognews/stories/WN0000237.txt
"A reliable source on the island of Aruba has confirmed reports of a recent murder / decapitation, and also confirmed reports of another murder currently under investigation in Aruba. A third report regarding a possible new missing person report filed today has not been confirmed at this time."
I think they had not counted on the vast media interest, a la Scott Peterson, and all of them were conspiring to send up the two security guards. It probably worked before, after all, you have men like the father making the final decision over there.