Great thriller. I can't believe that was filmed in 1968! That was a wonderful year for the cinema. The rhythm is excellent for a film of that time. The plot and twists shows a marvelous creativity (never seen in another film until 2018: the rob is so ingenious!). The music is so beautiful that became a classic! Unforgettable film to recommend to everyone that love police stories! OK, it's not perfect, some errors, etc., but you'll enjoy it anyway!