An arrogant high-school football star, known to be an abrasive class clown and a bully, is found murdered in a school bathroom. The CSI team picks through evidence indicating that the boy was murdered in retaliation by one of his put-upon victims. And in another case, Sara (Jorja Fox) and Nick (George Eads) piece together the clues when the decomposed body of an ex-serviceman is found unceremoniously stuffed in a huge bag. ~ Hal Erickson, Rovi