Such as, Sloot says, just drop me and Natalee off at the beach by the Marriot. I should be able to find a ride, if not I'll walk. If anyone asks, just say we took her back to her hotel and she stumbled getting out. She said she was ok and some security guard in black uniform was talking to her. And the brothers drive away.
The knock on the door occurs at 3 am. Their stories are already set and prior to a news cycle.
I don't quite agree with your theory. I don't the stories were planned ahead of the rape/murder. That would mean it was all premeditated and I don't think that is the case. I think she was given an accidental overdose.....or raped/killed in the "heat of the moment" after refusing his advances.....
The stories were concocted after the fact, imho.
"The younger Van Der Sloot, born Aug. 6, 1987, may have been romantically involved with the 18-year-old Holloway the night she disappeared. He met Holloway at a hotel casino two days before she was last seen, Aruban Police Commander Jahn van der Straaten told reporters."