He is arrested by the team whilst he is deep undercover. He is friends with Michelle Hanna. CIA Agent who worked on the Isaak Sidorov case and then later with Kensi and Granger in Afghanistan.
Kensi initially believes him to be her suspect, but she later realizes he is a skilled operative and will be of great use to her. In season 8, it is revealed that Sabatino is working as part of a rogue CIA faction attempting to dismantle the NCIS team