Octavio Rodriguez

Voight and the team help ASA Nina Chapman pursue a drug runner who dodged prison years ago after Chapman's informant mysteriously disappeared; the investigation takes a turn when Voight uncovers a damaging secret from Chapman's past.

The NCIS team places Mateo Diaz (Octavio Rodriguez), a high school gang member turned informant, in protective custody while they investigate the murder of his junior reserve officers' training corps instructor. Also, Pride needs his brother Jimmy Boyd's (Jason Alan Carvell) help to gain Mateo's trust.