In the late 1920s, he attracted public attention when he supported calls for a new trial for Sacco and Vanzetti, two Italian immigrant anarchists who had been sentenced to death on robbery and murder charges. Frankfurter wrote an influential article for "The Atlantic Monthly" and subsequently a book, "The Case of Sacco and Vanzetti: A Critical Analysis for Lawyers and Laymen". He critiqued the prosecution's case and the judge's handling of the trial; he asserted that the convictions were the result of anti-immigrant prejudice and enduring anti-radical hysteria of the Red Scare of 1919–20. His activities further isolated him from his Harvard colleagues and from Boston society.