NCIS: Season 2, Episode 11

2 - 11: Blackwater

A Navy officer's body is found in a car pulled from a lake by a celebrity private investigator. The man had been missing for two years. The PI now wants to claim the reward posted by the family, but the NCIS team must complete the investigation to find the killer before the money is awarded. The case changes from accidental death to suspected murder when McGee discovers a bullet lodged in the car. The team initially suspect that the dead man's brother may be a prime suspect, but forensic evidence suggests someone unexpected is responsible for the killing.