Now it's possible she didn't voluntarily get in the car. Perhaps she was being abducted.
But what is a high school girl doing in a nightclub in Aruba in the first place?
In my area we had a similar incident -- a local high school cheerleader was on a class trip to Hawaii to participate in a cheerleading tournament.
She went partying, got drunk, and was last seen going off with two men.
She then plunged to her death from a hotel balcony. The two men were found sleeping off their hangovers in the room from which she fell.
I read about that story. These stories are awful. The parents will live with their decisions forever. But, you can't totally "protect' kids from doing stupid things.