Sounds like Richard Belzer was famous but anon at heart.
In his personal life, Belzer was a known conspiracy theorist, writing four different books about his beliefs. He was also a regular on Alex Jones' show, once referring to the Boston Marathon bombing as a false flag event.
https://www.dailymail.co.uk/news/article-11769183/Law-Order-SVU-Homicide-Life-Streets-star-Richard-Belzer-dies-aged-78.html
From Wikipedia:
UFOs, JFK, and Elvis: Conspiracies You Don't Have to be Crazy to Believe, ISBN 0-345-42918-4
How to Be a Stand-Up Comic, ISBN 0-394-56239-9
I Am Not a Cop!: A Novel, ISBN 1-4165-7066-7
I Am Not a Psychic!, ISBN 1-4165-7089-6
Dead Wrong: Straight Facts on the Country's Most Controversial Cover-Ups, ISBN 1-6160-8673-4
Hit List: An In-Depth Investigation into the Mysterious Deaths of Witnesses to the JFK Assassination, ISBN 978-1620878071
Someone Is Hiding Something: What Happened to Malaysia Airlines Flight 370?, ISBN 978-1632207289
https://en.wikipedia.org/wiki/Richard_Belzer#Books