You must be kidding. Why isn't the discussion at hand that she had a relationship with Van Der Sloot, things got out of hand or ugly, something happened to her, her body was put out to sea, no body no crime?
Strange things do happen though. Who would ever have suspected that Eliz. Smart would have been taken by some lunatic to be his alternate wife, and then turn up nearly a year later? I was convinced she was dead. Same with the little boy last week, I was sure a bear had gotten him.
The most plausible theory is someone or some people did not get the sex they wanted from Natalie and things got out of hand. Her body was probably dumped far enough off shore so it would be difficult to locate her. The second theory is that she has been kidnaped.