Wheeler (1975)
aka
Psycho from Texas
The Butcher
Evil + Hate = Killer
The Hurting
The Mama's Boy
The Southern-fried plot involves a kidnapping masterminded by the greedy son-in-law of a rich oil baron (which naturally goes completely awry). The hired goon he gets to do this "Wheeler, the titular "Psycho from Texas", is a completely unlikeable and physically unattractive sociopath, who the filmmakers for some reason try to turn into some kind of tragic, sympathetic anti-hero by showing flashbacks of him as a grubby little kid watching his prostitute mother service male clients while a strangely touching country music song plays on the soundtrack. (IMDB lazarillo)