CBS

Season 10: Episode 12 - Long Ball

Long Ball: During a high profile golf tournament, a golf pro is found dead and the CSIs discover strange connections to this victim including a stepson, himself a golf pro, who has been competing with the victim for some time, and an estranged ex-wife who may have had motivation to kill him. In the end, The CSI team discovers that it wasn’t murder but an unfortunate accident.  The victim and his step son were fighting on the greens and  in a moment of anger, the victim flung his club into the ground causing it to break off, striking himself in the head. His stepson was watching the whole horrifying event and ran from the scene without telling the police.