NCIS: Season 3, Episode 5 - ProjectFreeTV

3 - 5: Switch

The team is called to investigate the murder of a Petty Officer who was gunned down while driving on a freeway. While visiting the sailor's commander to inform him of the death, the team discovers that another man claims to be the Petty Officer and that his identity may have been stolen. Secrets in both men's lives are revealed, but it is shrewd observations by Abby that end up solving the case.