 He resorts to unorthodox strategies of jailing witnesses, forging statements, and confronting witnesses with false accusations by others, even going so far as arresting Arena.In 1967, director Elio Petri adapted Leonardo Sciascia's novel "To Each His Own" as "We Still Kill the Old Way".The film was a box office hit in Italy, which led to producers Ermano Donati and Luigi Carpentieri to green-light the adaptation of another Sciascia novel they had purchased, "The Day of the Owl".