Personally, IMHO, I still think that "Lorenzo" fellow who supposedly had Natalee in his basement ( news we got from a post by an Arubian citizen...somewhere on the first thread) is a key. Supposedly Lorenzo is the (illegitimate?) son of P. van der Sloot from a previous relationship with a woman on the island. That woman married and her husband committed suicide. However, there is also suspicion that he was murdered.
Lorenzo was brought in for questioning and then let go. Shortly after Crues was named, and now he is being held. Did Lorenzo "finger" Crues? Seems funny the two were brought in so close together.
It seems papa VDS has had some unusual acquaintances either in his past or presently. Very possible he is in on/knows of what happened to Natalee.
I don't think a NYT best selling mystery writer could top this story.