Kutner gained national recognition in 1949, when he obtained freedom for a black mechanic from Waukegan, Illinois, James Montgomery, who had served 26 years of a life term sentence for raping an itinerant. A Federal judge described as "a sham" the defendant's 1924 trial in which a vengeful prosecutor withheld vital evidence. He also helped free Hungarian Cardinal József Mindszenty, American fascist poet Ezra Pound, former Congo President Moise Tshombe and represented the Dalai Lama and Tibet. Kutner is widely known as one of the most prominent human-rights attorneys of the twentieth century.