As Tony walks through his apartment, vacancy is apparent not only in the wide-angled emphasis of space and depth without wife or child, but when Tony picks up the novel his wife read and observes the lone painting surrounded by white wall above her bedside, there is amazing composition epiphany: any kind of world culture in Tony's life has less to do with his hit-man lifestyle than the interests of his deceased wife.
Also titled "Tony Arzenta". Excellent 70s Italian Mob vengeance film. More brutal and less romanticized than the American Mob films of the time. Some creative and fairly destructive car chases. Some unexpected turns. And Alain Delon playing cool with submerged passion as only Delon can.