Natt was arrested January 7, 1978 by the Khmer Rouge He wote and painted pictures of his experiences in the Tuol Sleng prison, also known as S-21. He wrote his life story in the 1988 book, "A Cambodian Prison Portrait: One Year in the Khmer Rouge's S-21 Prison". It is the only written story by a survivor of the prison. Nath survived because he was a great artist. Comrade Duch did not kill him, so that Natt could make paintings and sculptures of Pol Pot. He played an important role in helping to revive the arts in Cambodia after decades of war and genocide.