Grew up in Connecticut, briefly attended college and after a stint in the Army moved to NYC to begin a career in comedy. His successful stand-up comedy career led to more and more acting roles. Began playing Det. John Munch in 1993 on Homicide: Life on the Street
, when Homicide
was canceled he began playing the same character on Law & Order: SVU
. Although best known for that role he has played in numerous movie and TV roles and is a published author.