Scuba Doobie-Doo

Sara and Warrick are lead by Grissom to investigate an emply apartment found with blood sprayed across the walls. When the prior tenant claims that his missing girlfriend went to visit her parents yet the parents supposedly never saw her. In the aftermath of a wildfire near Lake Mead, a scuba diver is found in the upper reaches of a burnt-out tree. Did the diver fulfill an Urban Legend?