Best Investigation movies of 1970s

Actors : Cheri Caffaro, Richard Smedley, Patrick Wright, Laurie Rose,
Directors : Don Schain,

Cheerleaders and models are kidnapped & sold by a white slavery ring. Female agent is sent to rescue them.

Actors : Anthony Steffen, Sylva Koscina, Giovanna Lenzi, Renato De Carmine,
Directors : Sergio Pastore,

A blind pianist tries to figure out who is responsible for a string of murders using a black cat with its claws dipped in curare.

Actors : David Bailey, Randolph Roberts, Scott Brady, Tiffany Bolling,
Directors : Richard L. Bare,

A tongue-in-cheek psycho movie in "Duo-vision." The entire feature employs the split-screen technique used in parts of Brian De Palma's "Sisters" that same year. As a handyman at a seacoast...

Actors : Dana Wynter, Jay Silverheels, Michael Burns, Glenn Ford,
Directors : Gary Nelson,

A bounty hunter takes in the son of a man he killed.

Actors : Victor Izay, Leslie McRay, Tom Pace, Lila Zaborin,
Directors : Ted V. Mikels,

Lorraine and Mark enter the world of witchcraft where Mara foretells the future and helps them remember their past lives. When a series of mysterious murders begin to occur, they turn to Dr. Helsford for advice.

Actors : Verna Bloom, Henry Darrow, Eddie Egan, Robert Duvall,
Directors : Howard W. Koch,

After his suspension for the shooting death of drug runner, a New York City cop vows to keep the streets clean, any way he can.

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 : 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 : 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 : Diana Lorys, Paul Naschy, Eduardo Calvo, Eva León,
Directors : Carlos Aured,

An ex-convict, troubled by dreams that he strangles women, is hired as the caretaker on an estate owned by three very strange sisters. Soon after his arrival, a serial killer begins ...

Actors : Mascha Gonska, Romy Schneider, Philippe Brizard, Michel Piccoli,
Directors : Francis Girod,

A cunning French legal adviser teams up with an unemployed German girl and her sister to commit murders in Marseille.

Actors : Philippe Clay, Cindy Eilbacher, Marcel Marceau, Tsilla Chelton,
Directors : William Castle,

A mute puppeteer uses a deceased scientist's invention to control dead bodies like puppets.

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 : Jacqueline Bisset, John Phillip Law, Sam Wanamaker, Christopher Plummer,
Directors : Peter Collinson,

Helen has been incapable of speech since seeing her husband die - will she become the target of a deranged serial killer targeting disabled people?

Actors : Joseph Cotten, Tomas Milian, Maria Fiore, Mario Piave,
Directors : Umberto Lenzi,

A biker's brother is killed while investigating the kidnapping of a young boy, the byproduct of a war between two crime families. The biker vows to get revenge by finding the kidnapped boy and destroying the two families.

Actors : Mel Ferrer, Lia Tanzi, Claudio Cassinelli, Gianfranco Barra,
Directors : Sergio Martino,

A young prostitute is found brutally killed and is up to detective Germi (Claudio Cassinelli) the investigation of the case, as the search progress he uncovers a girls trafficking ring with connections to powerful people.

Actors : Thalmus Rasulala, Dean Martin, Eugene Roche, Denise Nicholas,
Directors : Paul Bogart,

A San Francisco attorney (Dean Martin) is hired to defend a black militant accused of murder.

Actors : Jean-Louis Trintignant, Jacqueline Bisset, Marcello Mastroianni, Aldo Reggiani,
Directors : Luigi Comencini,

Police commissioner Santamaria is investigating the murdering of the ambiguous architect Mr. Garrone. The investigations soon drive him into the Torino's high society. Santamaria suspect ...

Actors : Jean-Pierre Aumont, Michèle Morgan, Philippe Léotard, Serge Reggiani,
Directors : Claude Lelouch,

A very unorthodox police inspector is assigned to investigate a millionaire's mysterious death.

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 ...