Harper

In this gripping crime thriller set in Los Angeles, a private investigator is hired by a wealthy woman to find her missing husband. As he delves deeper into the case, he uncovers a web of deceit and illegal activities, including a human smuggling ring. With the help of his associate, the investigator encounters dangerous characters and narrowly escapes death. In the end, they uncover the truth behind the husband's disappearance, but not before facing off against the ruthless mastermind behind the criminal operation.

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Some movies that have similar genres and were produced around the same time as Harper include Fragment of Fear, The Night of the Generals, In the Heat of the Night, Four Flies on Grey Velvet, Murders in the Rue Morgue, Agatha Christie's Ten Little Indians.

Harper was released in theaters on March 30, 1966.