Best Investigation movies of 1988

Actors : Richard Hatch, Shawn Weatherly, Greta Blackburn, Leif Garrett,
Directors : William Webb,

A rich brother and sister are crazed killers. She lures men into her bed, and he attacks them and murders them. A detective is assigned to find the killers and bring them in.

Actors : Saira Banu, Vinod Khanna, Bindu, Ashok Kumar,
Directors : S. Ramanathan,

Three convicts escape from prison to avenge the rape and death of one of their daughters', and get involved in a mansion's mystery involving the death of the owner, allegedly at the hands ...

Actors : Jerry Van Dyke, Yvette Nipar, Martin Landau, Morgan Douglas,
Directors : Virginia L. Stone,

A young woman accidentally sees snuff films through a satellite dish aberration and alerts the police, who are already looking for a serial killer.