Best Investigation movies of 1970s

Actors : Linda Marlowe, Gary Hope, Sean Hewitt, Richard Monette,
Directors : Lindsay Shonteff,

A female private detective, Harriet Zapper, is hired by a rich old man to find his missing children, and becomes involved in counterfeiting and murder

Actors : Johnnie Hill, Emerson Boozer, Owen Watson, René Van Clief,
Directors : Michael Fink,

The female head of a detective agency is hired by a crime lord to figure out who's taking his action.

Actors : Preston Pierce, Georgina Spelvin, Susie Ewing, Rosalind Miles,
Directors : Al Adamson,

A team of girls go on a killing spree across the country.

Actors : Akiko Nishina, Keiko Kishi, Kôji Kita, Kôji Ishizaka,
Directors : Kon Ichikawa,

Kôsuke Kindaichi, a somewhat peculiar private detective, visits a remote town. He meets a police detective and they start to investigate an old unsolved murder. Then some murders happen. ...

Actors : Vinod Mehra, Sanjeev Kumar, Shatrughan Sinha, Sunil Dutt,
Directors : Rajkumar Kohli,

A newly married bride disappears after her marriage.

Actors : Jennifer O'Neill, Robert Duvall, Patrick Magee, Donald Sutherland,
Directors : Tom Gries,

An insurance investigator romances a wealthy young beauty when he suspects she may be involved in fencing stolen jewels.

Actors : Gloria Hendry, Sherry Jackson, Michael Heit, Robert Viharo,
Directors : Don Edmonds,

A bounty hunter in Los Angeles sets out to track down and stop a masked serial killer who murders women by using kung-fu moves.

Actors : Antoine Vitez, Anne Parillaud, Sami Frey, Catherine Deneuve,
Directors : Hugo Santiago,

Young aristocrat Arnaud de Maule hires female private detective Claude Alphand to investigate a strange cult, the Church of the Final Revival, that tried to recruit his girlfriend Chloé, who then disappeared, and it now stalks him.

Actors : Lori Saunders, Robert Ginnaven, Lou Hoffman, Dean Jagger,
Directors : Harry Thomason,

A young woman just released from a mental hospital moves back in with her family. However, she is soon troubled by disturbing visions in which she commits a series of axe murders.

Actors : Shivaji Ganesan, Nagesh, Y.G. Mahendran, Chendamarai,
Directors : Vietnam Veetu Sundaram,

Emotional drama of two lawyers - uncle and nephew - Shivaji Ganesan in dual role. Uncle obsessed with legalities alone whereas the nephew intent on looking at the moralities too.

Actors : Hasan Mammadov, Shafiga Mamedova, Rasim Balayev, Aleksandr Kalyagin,
Directors : Rasim Ojagov,

The investigator Seifi Ganiev runs the case of an illegal mercery shop's head Murad Abiyev, who confessed in embezzlement of one million rubles from public funds.Abiyev is also accused of ...

Actors : Dae-yeob Lee, In-suk Ahn, Mu-ryong Choi, Hyeok Jang,
Directors : Tae-ho Seol,

Nan-hie is slowly coerced into a life of crime by her boyfriend, Park. She is trained in assassination techniques and sent to assassinate the head of the Special Investigation Unit. However...

Actors : Elke Sommer, Dean Stockwell, Bradford Dillman, Patrick Mower,
Directors : Sidney Hayers,

An imprisoned gypsy makes a break for it which triggers a manhunt.

Actors : Joy Mukherjee, Ram Mukherjee, Toy Mukherjee, Deb Mukherjee,
Directors : Ram Rano,

A maniac serial killer on the prowl, hunting assorted nubile lasses. A mentally unstable ex-army officer who is an utter misogynist. Are they the same man?

Actors : Cheng Yi Chi, Han Chiang, Lap Ban Chan, Chok Chow Cheung,

Part 1 : 'Gun Snatchers' - Two criminals wanted for murder are turned in by one of their own. Part 2: 'Arson' - A Triad revenge plan to burn down a nightclub goes wrong and results in the deaths of five people.

Actors : Rossella Bergamonti, Stelio Candelli, Patrizia Viotti, Veronika Korosec,
Directors : Leopoldo Savona,

A man finds his wife brutally murdered. He has no alibi so is instructed by his lawyer to go into hiding in an abandoned hotel. Strange occurrences start happening immediately.

Actors : Ingrid Pelicori, Jorge Hayes, Román García Azcárate, Rubén Szuchmacher,
Directors : Miguel Bejo,

A comic strip detective and a superhero are hired to investigate separated ly the successive murders of CEOs within a real life corporation symbolizing a nation, while subversive groups and...

Actors : Yong-woon Kwon, Seung-mi Kim, Bobby Kim,
Directors : Young Nam Ko,

Interpol is called in to investigate the murder of the inventor of a laser dubbed Cobalt 70 and the theft of the diamond which operates it.

Actors : Charles Heung, Fu-Wan Chin, Tina Chin-Fei, Ching Chen,
Directors : Tian-Lin Wang,

Returning home from being abroad, Tang Kin Ko discovers his family has been killed and his sister is missing. Tang is determined to find the killer and the disappearance of his sister, so ...

Actors : Blackie Shou Liang Ko, John Liu, Cecilia Wong, Chi Ping Chang,
Directors : Hsin Yi Chang,

A criminal monk leaves the Shaolin monastery on a brutal rampage that terrorizes the county. A massive manhunt quickly pursues him. Meanwhile, Chow, an amorous young man, is caught with ...