[handy]

FWIW - I doubt there is much the adults on the trip could do to prevent a motivated 17-18 year old from sneaking off. It was the last night there, so it's not like they could send her home early. I also have read that Natalee got in the car with only Joran, then the other two materialized. That's pretty plausible.

[hershey]

Plus, from all accounts, Joren was basically stalking Natalee. Her friends said he'd show up every day, like clockwork. He had an agenda, and she didn't realize he was dangerous. She thought he really liked her. If she'd had any suspicions about him, she'd have warned the chaperones and asked them to keep an eye on him.