Career
He currently portrays Detective Lionel Fusco on the Columbia Broadcasting System crime drama Person of Interest. Prior to acting, he had worked as a doorman and a stand-up comedian. While working at the Boston Office of Cultural Affairs, Chapman was discovered by the late director, Ted Demme, and was cast as Mickey Pat in Monument Avenue.
(1998).
Other notable film roles of his include The Cider House Rules, 21 Grams, In Good Company, an Italian mobster in Boondock Saints (1999), and Fire Lieutenant Frank McKinney in Ladder 49 (2004). Chapman starred as Irish Mob boss, Freddie Cork, for three seasons in the Showtime original series Brotherhood.
Chapman played a first responder assisting Jack Bauer (Kiefer Sutherland) in season 1 episode 24 of the tv series 24 (2001) and Kevin Mitchell in season 3 of 24 (2003). and a Central Intelligence Agency operative (O"Leary) in the independent comedy Black Dynamite.
In 2006, Chapman appeared as an officer in the episode "Lessons Learned" (Season 2, Episode 10) of Criminal Minds. In 2010, he played Bunny in Tony Scott"s action film Unstoppable.
He also was a guest star in the series Lost. He appears in the film Bad Country (2013), directed by Chris Brinker.
He currently portrays Detective Lionel Fusco on the Columbia Broadcasting System show Person of Interest.