Richard Belzer, the longtime stand-up comedian who became one of TV’s most indelible detectives as John Munch in “Homicide: Life on the Street” and “Law & Order: SVU,” has died. He was 78. 

Belzer died Sunday at his home in Beaulieu-sur-Mer, in southern France, his longtime friend Bill Scheft said. Scheft, a writer who had been working on a documentary about Belzer, said there was no known cause of death, but that Belzer had been dealing with circulatory and respiratory issues. The actor Henry Winkler, Belzer’s cousin, tweeted, “Rest in peace Richard.” 

For more than two decades and across 10 series — even including appearances on “30 Rock” and “Arrested Development” — Belzer played the wise-cracking, acerbic homicide detective prone to conspiracy theories. Belzer first played Munch on a 1993 episode of “Homicide” and last played him in 2016 on “Law & Order: SVU.” 

Belzer never auditioned for the role. After hearing him on “The Howard Stern Show,” executive producer Barry Levinson brought the comedian in to read for the part. 

“I would never be a detective. But if I were, that’s how I’d be,” Belzer once said. “They write to all my paranoia and anti-establishment dissidence and conspiracy theories. So it’s been a lot of fun for me. A dream, really.” 

From that unlikely beginning, Belzer’s Munch would become one of television’s longest-running characters and a sunglasses-wearing presence on the small screen for more than two decades. In 2008, Belzer published the novel “I Am Not a Cop!” with Michael Ian Black. He also helped write several books on conspiracy theories, about things like President John F. Kennedy’s assassination and Malaysia Airlines Flight 370. 

“He made me laugh a billion times,” his longtime friend and fellow stand-up Richard Lewis said Sunday on Twitter. 

Born in Bridgeport, Connecticut, Belzer was drawn to comedy, he said, during an abusive childhood in which his mother would beat him and his older brother, Len. He would do impressions of his childhood idol, Jerry Lewis.  

“My kitchen was the toughest room I ever worked,” Belzer told People magazine in 1993. 

After he was expelled from Dean Junior College in Massachusetts, Belzer embarked on a life of stand-up in New York in 1972. At Catch a Rising Star, Belzer became a regular performer and an emcee. He made his big-screen debut in Ken Shapiro’s 1974 film “The Groove Tube,” a TV satire co-starring Chevy Chase, a film that grew out of the comedy group Channel One that Belzer was a part of. 

Before “Saturday Night Live” changed the comedy scene in New York, Belzer performed with John Belushi, Gilda Radner, Bill Murray and others on the National Lampoon Radio Hour. In 1975, he became the warm-up comic for the newly launched “SNL.” While many cast members quickly became famous, Belzer’s roles were mostly smaller cameos. 

But Belzer became one of the era’s top stand-ups. Belzer often played a stand-up comic in film, including in 1980’s “Fame” and 1983’s “Scarface.” But Munch would change Belzer’s career. 

“Munch was based on a real guy in Baltimore who was a star detective, in a way. He would come onto grisly murder scenes, start doing one-liners, because someone had to break the tension,” Belzer told the AV Club. “So Munch served a very important function. Not only was he a dissident who said what was on his mind, he kind of had the gallows humor that’s needed in a homicide squad.” 

Belzer is survived by his third wife, the actress Harlee McBride, whom he married in 1985. For the past 20 years, they lived mostly in France. 
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