NCIS just killed off a main character in the 500th episode - and the cast member opened up about how it "was not" their choice to leave the show. During the Tuesday, March 24, episode of the hit CBS series, Rocky Carroll's character, Leon Vance, was shot by a CID agent. Initially, it looked like Vance was wearing a vest but he ultimately bled out from the fatal gunshot wounds. "No, it was not my choice," Carroll, who has been on NCIS since 2008, told TV Insider.