After his release from prison, Dalton Trumbo resumed writing under a variety of pseudonyms.
In 1957, Dalton Trumbo's story for "The Brave One," which he wrote under the name Robert Rich, won an Oscar.
In January 1960, producer-director Otto Preminger openly defied the blacklist when he told the New York Times that Trumbo had written the script for "Exodus" and would receive screen credit. Seven months later, it was announced that Trumbo would receive sole screenplay credit on Kirk Douglas' film "Spartacus." Both films were released later that year.
Christopher Trumbo graduated from Columbia University in 1963, after taking off a year to work as an assistant director on "Exodus."
He later worked as associate producer and assistant director on the 1971 anti-war drama "Johnny Got His Gun," which was written and directed by his father.
"Christopher's use of thought and language was unsurpassed," said Michael Butler, the son of Hugo Butler and Christopher Trumbo's writing partner in the late '60s and early '70s.
"Unlike most of us in the '60s, Christopher was dedicated to always doing the right thing," Butler said. "He was an extraordinary moral and ethical human being. His path was always one of tremendous rectitude."
Trumbo, who was frequently interviewed about the Hollywood blacklist and appeared in several documentaries on the subject, was working on a memoir/history of the blacklist at the time of his death.
Besides his sister Mitzi, Trumbo is survived by his wife, Nancy Escher; and his other sister, Nikola Trumbo.