Best Investigation movies of 1970s

Actors : Donald Pilon, Jean-Louis Roux, Christopher Plummer, Karen Black,
Directors : Harvey Hart,

A detective investigating the death of a heroin-addicted prostitute uncovers evidence pointing to the existence of a murderous devil cult.

Actors : Percy Herbert, Lee Van Cleef, Carroll Baker, Stuart Whitman,
Directors : Alexander Singer,

A Native American born US Army officer, Captain Apache, investigating a murder, uncovers a presidential assassination plot.

Actors : Ewa Aulin, Klaus Kinski, Angela Bo, Sergio Doria,
Directors : Joe D'Amato,

A man discovers an ancient Incan formula for raising the dead, and uses it for a series of revenge murders.

Actors : Jacques Herlin, Fabio Garriba, Carla Tatò, Gian Maria Volontè,
Directors : Marco Bellocchio,

A populist right-wing tabloid newspaper tries to derail the official police investigation of a brutal murder of a young girl in order to help the fascist and right-wing candidates it supports in the upcoming elections.

Actors : Yôko Shimada, Kensaku Morita, Gô Katô, Tetsurô Tanba,
Directors : Yoshitarô Nomura,

Detectives investigate the murder of an old man found in a Tokyo rail yard.

Actors : Liv Ullmann, Max von Sydow, Trevor Howard, Per Oscarsson,
Directors : Laslo Benedek,

A man named Salem escapes from an insane asylum where he was confined for an axe-murder. Falsely convicted under a plea of "guilty due to insanity", he does not plan to let his sister and ...

Actors : Frederic Forrest, Al Lettieri, Robert Forster, Anthony Quinn,
Directors : Richard Fleischer,

After his mistress is savagely beaten up a Mafia leader goes after the killer with a bloody vengeance. Soon after the hunt begins, a gang war ensues.

Actors : Jean Anderson, Patricia Neal, Nicholas Clay, Pamela Brown,
Directors : Alastair Reid,

Effective psychological love story with a macabre twist not found in the original Joy Cowley novel. The dreary existence of middle- aged spinster Maura Prince takes an unexpected turn with ...

Actors : Judith Resnick, Martin Barolsky, Earle Edgerton, Kaly Mills,
Directors : Leonard Kirtman,

A psychopathic killer uses the carousel ride at a carnival to pick his victims, whom he then murders and dismembers.

Actors : Ian Bannen, Guido Mannari, Elizabeth Taylor, Mona Washbourne,
Directors : Giuseppe Patroni Griffi,

Mentally disturbed spinster Lise experiences a series of bizarre encounters in Rome as she searches for someone to murder her.

Actors : Jean-Louis Trintignant, Sacha Distel, Dominique Sanda, Carla Gravina,
Directors : Philippe Labro,

A strange series of murders are being committed in Nice on the French riviera. The commissionaire Carella is in charge and tries desperately to find a missing link between all of these ...

Actors : Françoise Fabian, Giancarlo Badessi, Franco Nero, Pierluigi Aprà,
Directors : Damiano Damiani,

The latest success by film-maker Giacomo Solaris is a crime thriller about a judge who gets too friendly with the Mafia and is murdered. A resentful Sicilian magistrate orders the film ...

Actors : Ralph Bellamy, Forrest Tucker, Bob Hope, Eva Marie Saint,
Directors : Paul Bogart,

Bob Hope is a stressed out talk show host who is sent on a vacation to Arizona on doctor's orders and has to play Sherlock Holmes with his wife, the lovely Eva Marie Saint, to solve a series of murders that has Bob as the prime suspect.

Actors : Morgan Woodward, Burt Lancaster, Cameron Mitchell, Susan Clark,

An ex-con, once a cop, now working as security in a college, decides to investigate the murder of one of the students, a daughter of a senator.

Actors : Johnny Sekka, Peter Cushing, Alexander Davion, Patrick Macnee,
Directors : Robert Hartford-Davis,

A group of friends search for a young English Oxford student who has disappeared whilst researching in Greece. They are shocked to find that, wherever he has been, certain unsolved murders ...

Actors : Tiiu Leek, Christopher Lee, Daniel Pilon, Robert Vaughn,
Directors : Ed Hunt,

An advance team from a dying, far-off civilization seeks a new world to conquer and inhabit -- Earth!

Actors : Silvano Tranquilli, Luc Merenda, Carlo Alighiero, Richard Conte,
Directors : Sergio Martino,

When Milano police lieutenant Giorga's chief is murdered by an organized crime ring, he vows to avenge his boss's death. Going undercover to continue the chief's investigation, he plans to ...

Actors : Tom Pittman, Bob Jones, Ray Lynch, Hal Reed,
Directors : Tom Hanson,

The San Francisco area is beset by a series of seemingly random murders without motive or pattern. The police are taunted by phone calls and letters. Could the maniac be the violent, truck ...

Actors : Reatha Grey, Stan Kamber, Marlo Monte, Tiffany Peters,
Directors : Jamaa Fanaka,

A proud black man does time in jail where he is subjected to heinous experiments. Once released, he goes about extracting vengeance on those who put him in prison. This includes both ...

Actors : Cameron Mitchell, Faith Clift, Marc Lawrence, Richard Moll,

Police detective, Mitchell, investigating the death of a victim of a Nazi concentration camp discovers a nightclubbing playboy who has strange powers over women and is seemingly ageless.