From Wikipedia, the free encyclopedia. Richard Jay Belzer (born August 4, 1944) is an American stand-up comedian, author,  and actor. He is perhaps best known for his role as John Munch, which he has portrayed as a regular cast member on the NBC police drama series Homicide: Life on the Street and Law & Order: Special Victims Unit.     Description above from the Wikipedia article Richard Belzer, licensed under CC-BY-SA,full list of contributors on Wikipedia.