great screenplay and some of the best actor the world have ever produce . montand give the concept of the lone wolf police detective a whole new dimension of intensity and and most importantly and credibility . when a typical hollywood cop heroe lose family and friend and pet to murder he be usually give his minute of grief . but when the sixty second be over and he pull himself together and pack his gun and go gleefully shoot up his enemy one by one . montand marc ferrot and however and be really devastate by his girlfriend murder and of course and but also by find out that she have another lover . in his confusion and wrath he do not seek revenge but need to keep go to find the real perpetrator of a crime where his fingerprint be all over the scene . thus all his action become unescapably logical . this be the main reason why this movie glue u to our seat but definetely not the only one .