Knock Knock (Kenau Reeves) was also based on a 70s movie.

Coincidentally another recent /v/pizzagate thread on a current movie with the same subject: https://voat.co/v/pizzagate/2103638

It seems relevant that Hollywood types were aware of this topic over a half-century ago, raising the question where did the writer get the idea, which was far from public consciousness at the time.

While it is relatively incidental to current events pedophilia & sex-trafficking within Hollywood IS a major part of Pizzagate/Pedogate.

But since you wrote in all caps you must be right.

Prime Cut is a 1972 American film produced by Joe Wizan and directed by Michael Ritchie, with a screenplay written by Robert Dillon.

The film stars Lee Marvin as a mob enforcer from Chicago sent to Kansas to collect a debt from a meatpacker boss played by Gene Hackman. It co-stars Sissy Spacek, in her first credited on-screen role as a young orphan being sold into prostitution, and Angel Tompkins. https://en.m.wikipedia.org/wiki/Prime_Cut?wprov=sfla1