Best Investigation movies of 1964

Actors : Hideaki Nitani, Yûjirô Ishihara, Nobuo Kaneko, Ruriko Asaoka,
Directors : Toshio Masuda,

A hot-shot detective in Yokohama kills a witness during a drug investigation. He flees to the countryside and evades his past for several years, only to return to find the woman he loved ...

Actors : Peter Benison, Mary Chapman, Annette Bryant, John Atkinson,
Directors : Stanley Pelc,

A young woman finds out that her boyfriend has been lying to her about where he spends his weekends. She hires a private detective to follow him, and discovers that he has joined a nudist camp.

Actors : Ralph Persson, Hansjörg Felmy, Elke Arendt, Ingmar Zeisberg,
Directors : Eugen York,

A killer terrorizes the small German town of Hainsburg. The police moves in to investigate the crimes and finds a suspect among a small group of teenagers.

Actors : Ciccio Ingrassia, Margaret Lee, Antonella Steni, Franco Franchi,
Directors : Carlo Infascelli,

A dancer has been murdered in a striptease joint but the body seems to have disappeared.

Actors : Rodolfo Landa, Gina Romand, Chucho Salinas, Wolf Ruvinskis,
Directors : Alfredo B. Crevenna,

Neutron, a wrestler/superhero, investigates a series of murders at a sanitarium.