The "mastermind" behind the chaos is revealed to be Maggie Scott, a well-meaning but extremist social worker who attempted to arm local youth with stolen military rifles to act as a "deterrent" against rival gangs. Watch NCIS: S6E15 - Deliverance on Philo (Free Trial)

As the investigation unfolds, the team identifies a second person at the scene: PFC Tomas Tamayo, the son of Rose Tamayo—a woman who nursed Gibbs back to health after he was wounded during a covert mission 18 years prior. Gibbs enlists the help of his mentor, Mike Franks, to find Rose and uncover how her son ended up involved in a D.C. gang war.

The NCIS episode is a major installment for fans of Leroy Jethro Gibbs' backstory, diving into a classified 1991 Marine mission in Colombia. Plot Summary