found: In cold blood [MP] 1967:credits (Robert Blake as Perry)
found: Halliwell's filmgoer's comp., 1988(Blake, Robert; born 1933; AKA Michael Gubitosi; former child actor, then adult actor)
found: IMDb, June 30, 2006(Robert Blake; born September 18, 1933; sometimes credited as Bobby Blake, Mickey Gubitosi; birth name: Michael James Vijencio Gubitosi)
found: Wikipedia website, viewed March 29, 2023:Robert Blake (actor) page (Robert Blake (born Michael James Gubitosi in Nutley, New Jersey on September 18, 1933; died in Los Angeles, California on March 9, 2023), billed early in his career as Mickey Gubitosi and Bobby Blake, was an American prolific Golden Globe and Emmy Award winning actor, who appeared in some 200 films; he was best known for starring in the 1967 film In Cold Blood and playing the title role in the late 1970s television series Baretta) - https://en.wikipedia.org/wiki/Robert_Blake_(actor)