Faking It (S04E04)

The NCIS team is called to the scene of a bizarre murder of a Petty Officer who was part of an undercover arms operation. After his body is discovered, a Russian spy is pulled over for a traffic violation and is found with a recently fired gun in his back seat. With the bullet that killed the sailor missing, the seemingly open and shut case becomes more complicated when the department of Homeland Security claims the man accused of killing the Petty Officer is working for them. (CBS TV Network)