Nine of the 23 passengers in a bus traveling from L.A. to Las Vegas are killed in a crash. As he lies dying, the bus driver offers evidence indicating that the bus was sabotaged. Led by Grissom (William L. Petersen), the CSI team sifts through the wreckage of a sports car that was following the bus at high speed -- then shift their attention to locating one of the passengers, a recent parolee who has apparently vanished from the face of the earth. ~ Hal Erickson, Rovi