High Quality Content by WIKIPEDIA articles! Matthew Cvetic (March 4, 1909 - July 26, 1962) was a Pittsburgh native who was asked by the Federal Bureau of Investigation to join the Communist Party of the United States (CPUSA) as an informant in the 1940s. He told his story in a series in the Saturday Evening Post, and his experiences were then fictionalized in the old time radio show I Was a Communist for the FBI, adapted for a Warner Brothers motion picture in 1951. He testified before the House Un-American Activities Committee in the 1950s.