I wonder how Fuhrman would explain why PvdS is suspected of kidnapping and premediated murder if Natalee were already dead. We simply do not know enough facts yet to form a likely scenario. We can only form possible scenarios.
You are right. What we do here is speculate about news reports from a media that isn't always right.
The truth could be stranger than any of our fiction, as it was in the Elizabeth Smart case.