Tödlicher Karneval(1963)

The shooting of a movie is to take place in Rio de Janeiro. The script states that an actor is to shoot himself. The director wants to demonstrate how he imagines this scene. When he takes the revolver and pulls the trigger, he actually falls to the ground. The crew is horrified when they realize that the ammunition was live and the director is lying dead on the floor. Inspector Moura is assigned to investigate the case. He suspects a jealous motive.