his is my grandfather Julius Rosenberg, and this is Julius and Ethel Rosenberg together,” says a blonde child in pigtails, pointing to family pictures in a home movie from the 1970s at the beginning of the new documentary Bully. Coward. Victim. The Story of Roy Cohn. “My father and uncle were around 10 and 6 when [their parents] were electrocuted.” The young girl is Ivy Meeropol, the film’s director; its subject, Roy Cohn, was prosecuting attorney in the Rosenberg trial.
https://www.thenation.com/article/culture/bully-coward-victim-roy-cohn-ivy-meeropol-interview/