Best Investigation movies of 1970s

Actors : Marcel Bozzuffi, Domenico Santoro, Françoise Fabian, Andrea Balestri,
Directors : Carlo Lizzani,

Mino and Lello, two sons of a worker wrongly accused of murder, try to find out evidence of his innocence and begin to investigate mafia business in Torino.

Actors : John Karlen, Susan Sullivan, Martin Speer, James Luisi,
Directors : Jeremy Hoenack,

A detective tracks a serial killer through San Francisco.

Actors : Philippe Lemaire, Robert Woods, Emma Cohen, Françoise Brion,
Directors : Jesús Franco,

A nightclub singer is haunted by the ghost of her late father. The dead man summons her through a mirror, forcing her to commit a series of violent crimes.

Actors : Broderick Crawford, George Kennedy, Mariko Okada, Yûsaku Matsuda,
Directors : Jun'ya Satô,

When an American is murdered in a Japanese inn, Tokyo police detective Munesue follows the trail of the killer to New York. There he is joined by a New York City detective named Shuftan and together they sort out the crime.

Actors : Scott Antony, Michael Williams, Nina Thomas, Judi Dench,
Directors : Tony Richardson,

As a surprise, two horse owners decide to ride their animals themselves in a steeplechase. But Bill Davidson's horse "Admiral" behaves weirdly, and falls hard after an obstacle. Bill dies ...

Actors : Delia Boccardo, Luc Merenda, Mel Ferrer, Michele Gammino,
Directors : Sergio Martino,

Starting the investigation of a murder mystery, a police man is to investigate dangerously top politicians and military. A chain of suicides takes its toll among the current and past ...

Actors : Renato Aragão, Dedé Santana, Mussum, Vera Setta,
Directors : J.B. Tanko,

Woman hires three clumsy adventurers to rescue her missing archaeologist father, who was trying to find the legendary King Solomon's mines.

Actors : Luanne Roberts, Buddy Pantsari, Julie Conners, John Alderman,
Directors : Jonathan Lucas,

A private detective journeys to Africa to find a legenday white gorilla. The gorilla turns out to be an escaped Nazi war criminal.

Actors : Elizabeth Alexander, Michelle Jarman, Nick Tate, John Waters,
Directors : Ken Hannam,

A teacher discovers one of his students has a rare blood disease, and is drawn into a mystery that culminates in a thrilling climax.

Actors : Michael Ontkean, Ralph Waite, Kathleen Cody, Dianne Hull,
Directors : Thomas J. Schmidt,

Two girls on their way to a hippie encounter session pick up a crazed Vietnam veteran, who might just be the serial killer who is murdering hippies in the area.

Actors : Antonella Antinori, Anna Maria Rizzoli, Mario Cutini, Ray Lovelock,
Directors : Mario Gariazzo,

A reporter and his girlfriend investigate deaths surrounding a hotel where several prominent people go to have sex.

Actors : John Wood, Tammy Grimes, Farrah Fawcett, Jeff Bridges,
Directors : Lamont Johnson,

A woman's husband is murdered and she and her lover must find the killer or stand accused of doing it themselves.

Actors : Michel Galabru, Philippe Noiret, Michel Serrault, Charles Denner,
Directors : Pierre Tchernia,

When he investigates his daughter's disappearance, a bookseller discovers an underground society, living literally under the streets of Paris.

Actors : Holly Woodlawn, Buck Henry, Marshall Efron, Alan Abel,

Driving through New York City in his Sexmobile, Dr. Harrison Rogers of the Bureau of Sexological Investigation, searches out luminary figures in the world of sex.

Actors : John Considine, Stewart Moss, Cheryl Miller, Barry Coe,
Directors : Eddie Saeta,

An evil immortal magician on a killing spree targets one specific couple in an attempt to prolong his life through soul transference.

Actors : Dave Galluzzo, Chip Greenman, Rich Pemberton, Rick Styles,
Directors : Don Edmonds,

A rock band called "The Clowns" comes under suspicion of murder when several prostitutes are killed by individuals made up like members of the band.

Actors : Silvano Tranquilli, Luciana Paluzzi, Claudio Gora, Henry Silva,
Directors : Umberto Lenzi,

When a crook gets framed as a drug kingpin, the mob decide to "off" his wife. Revenge is the name of the game, and the manhunt is on!

Actors : Perla Cristal, Jean Seberg, Marisol, Barry Stokes,
Directors : Juan Antonio Bardem,

A serial killer uses a scythe to slash his murder victims--or maybe it's *her* murder victims?

Actors : Rudolf Hrusínský, Libuse Holeckova, Hana Brejchová, Jana Vanková,
Directors : Petr Schulhoff,

Major Kalas (Rudolf Hrusínský) from the Prague criminal intelligence service has been sent to a small town of Dubá in North Bohemia to help with the investigation of the puzzling death of a...

Actors : Yuriy Demich, Aleksandr Zbruev, Irina Ponarovskaya, Bruno Frejndlikh,
Directors : Gerbert Rappaport,

Menya eto ne kasaetsya (aka... It's not my business) is set in Soviet Russia. The manager of a garment industry dies in a car accident. Investigation reveals that the accident was not a ...