Primum Non Nocere

After a fight breaks out among the players at an amateur hockey game, the goalie ends up at the bottom of a pile. When the pile clears up, he is found dead with a gash across his neck. Grissom, Catherine and Sara are called to determine whether the death was an accident or foul play. Meanwhile, Warrick and Nick investigate the apparently drug-related death of a sax player at a casino.