Local Aruban guy chats her up, convinces her to go to a "cooler" club nearby.
She drunkenly wanders off from the group, gets groped by the Aruban guy and his friends at the local bar and demands to return to her hotel.
Along the way they have their way with her, kill her, dispose of the body and tell the cops they actually did drop her off like she requested.
The cops accept this explanation, let them go, and watch them.
On the otherhand;
Did she have life insurance, with democrat parents that are having cash flow problems in their business.?.