Inside the Mind of a Psychopath

Inside the Mind of a Psychopath is a 2015 Chilean psychological thriller film written and directed by Alejandro Torres Contreras in his directorial debut. It is based on the life of the real-world serial rapist and eventual murderer Roberto "Tila" Martínez Vásquez, who would frequently break into houses throughout high-class neighborhoods of Santiago de Chile during the 90s and early 2000s as part of a social vendetta. It stars Nicolás Zárate as the titular character, accompanied by Daniela Ramírez, Rodrigo Soto and Daniel Alcaíno.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.