In Z (1969), an investigating judge, played by Jean-Louis Trintignant, tries to uncover the truth about the murder of a prominent leftist politician, played by Yves Montand, while government officials and the military attempt to cover up their roles. The film is a fictionalized account of the events surrounding the assassination of Greek politician Grigoris Lambrakis in 1963. It had additional resonance because, at the time of its release, Greece had been ruled for two years by the "Regime of the Colonels". Z won an Oscar for Best Foreign Language Film. Costa Gavras and co-writer Jorge Semprún won an Edgar Award from the Mystery Writers of America for Best Foreign Film Screenplay.