An Act of Murder is a 1948 American film noir directed by Michael Gordon and starring Fredric March, Edmond O'Brien, Florence Eldridge and Geraldine Brooks. It was based on a novel by the Austrian writer Ernst Lothar. The film was produced and distributed by Universal Pictures. It was entered into the 1949 Cannes Film Festival. It is also known by the alternative titles Live Today for Tomorrow and I Stand Accused.