The Toolbox Murders

The Toolbox Murders is a 1978 crime mystery thriller film directed by Dennis Donnelly, and written by Ann Kindberg, Robert Easter, and Neva Friedenn. The film was marketed as being a dramatization of a true story,citation needed and was infamously listed as a video nasty.citation needed In 2004, it was remade as Toolbox Murders.

Lauries brother Joey is questioned by Detective Jamison, and frustrated by the detectives seemingly lax attitude towards Lauries disappearance, decides to search for his sister on his own. While looking through the homes of the murdered women, Joey meets up with Kent, Vances nephew, who has been hired to clean up the apartments of the deceased tenants. While Joey is helping Kent, Kathy Kingsley, Kents cousin and Vances daughter, is brought up, with Kent mentioning that Vance has not been the same since Kathy died in a car accident.It is revealed that Vance is the serial killer, having been driven insane and to religious mania by the death of his daughter. He is killing sinners, and has kidnapped Laurie who is kept tied up in Kathys bedroom to replace Kathy. During a discussion with Detective Jamison, Joey realizes that all the clues point to Vance being the killer, so he goes to the Kingsley house, and is followed there by Kent who had earlier seen the bound Laurie in his uncles home. Joey finds bloody tools in Vances garage, and is confronted by Kent, who sets Joey on fire to protect his family. ........

Source: Wikipedia