Best Investigation movies of 1971

Actors : Alain Noury, Konrad Georg, Horst Tappert, Horst Frank,
Directors : Alfred Vohrer,

The son of an Argentine chemist travels to Vienna, to solve the murder of his father. Step by step, he realizes that his father was internationally entangled in secret service machinations ...

Actors : Tiziano Cortini, Agnès Spaak, Luciana Gilli, Ray Danton,
Directors : Guido Malatesta,

Jimmy Logan, a detective, tries to retrieve a diamond of the British crown, stealed by the infidel chief of the English Secret Service. After carrying out dangerous investigations at ...

Actors : Andreas Barkoulis, Alkis Yannakas, Anna Fonsou, Rena Kosmidou,
Directors : Omiros Efstratiadis,

A corpse is found at Anna's home, and she must explain the criminal investigator how she spent the night. And one story leads to another.

Actors : Assunta Perez, Roberto Maya, Newton Prado, Joana Fomm,
Directors : Maurice Capovila,

Neglected wife tells husband about mysterious deaths occurred by the influence of Iemanjá, Afro-Brazilian deity, goddess of the waters.

Actors : Armen Ayvazyan, Narma Erendzhenov, Goar Akopyan, Boris Bityukov,

Frontier guard soldier shoots a dog to protect a boy. But investigation of this accident unexpectedly discovers trespassing border by plotters.

Actors : Sung-il Shin, Jeong-im Nam,
Directors : Woo-yeol Jeon,

Sang-hyeon is accused of murder and smuggling by his former teacher who is now a police investigator.