"In Cold Blood" is an eerie case. Not a movie. A case. The film itself, which is fantastically powerful despite its flaws, is the last episode in a chain which began eight years ago when the Herbert Clutter family was murdered near Holcomb, Kansas.
The original Hollywood film noir era petered out toward the end of the 1950s, or right around the time the cinephile directors of the French New Wave started riffing on it. But well into the 1960s, noir's expressionistic visual style remained in play for some American auteurs (such as Sam Fuller, John Frankenheimer, Sidney Lumet, and Stanley Kubrick).