NCIS: Season 6, Episode 7

6 - 7: Collateral Damage

Gibbs and team are assigned a Probie to help investigate a bank robbery at Quantico. The security guard is shot and killed in the heist but only $27,000 was stolen and all of it was burned in the getaway vehicle. The Probie suggests looking into other similar cases and with DiNozzo's help finds a connection. It leads to the guard's son, a former convict, and his cell mate. Gibbs believe all parties will be at the guard's funeral, and with the Probie's help the team captures them both. Gibbs starts to believe that Agent Langer wasn't the mole in his unit and places Langer's old FBI ID at a bar wall dedicated to fallen officers and agents.