Sean

Sean was one of Jack Matthews' men. He was killed by Oscar in 2001.

Attack on the Dimmitt Mall
Jack Matthews is interrogating Wes Roth when he hears a noise he sends Billy and Sean to investigate while he puts Roth in a safe place and guards him. Sooraj, Cameron and Oscar put a bomb on the Dimmitt Mall's underground main entrance and blow the doors open, killing Billy and Sean.