Henry: Portrait of a Serial Killer (1986) stands as one of the most unsettling and brutally realistic crime films ever made. Loosely based on the confessions of serial killer Henry Lee Lucas, the film follows Henry (Michael Rooker) as he arrives in Chicago and moves in with ex-con acquaintance Otis (Tom Towles). What begins as a shared living arrangement quickly descends into a terrifying mentorship, as Henry schools the impressionable Otis in the cold, methodical ways of a serial killer.

The film's power lies in its unflinching, documentary-like approach. Director John McNaughton avoids sensationalism or glamorization, presenting violence with a stark, matter-of-fact realism that makes it all the more horrifying. Michael Rooker delivers a career-defining performance, embodying Henry with a chilling blend of quiet charisma and vacant menace. His Henry isn't a cartoonish monster, but a disturbingly plausible figure of mundane evil.

As a character study, the film is masterful, exploring the banality of violence and the warped dynamic between teacher and student. It's a difficult watch, but an essential one for fans of psychological horror and true crime cinema. The raw, low-budget aesthetic enhances the film's gritty authenticity, making it feel less like a movie and more like a glimpse into a real nightmare. Watch Henry: Portrait of a Serial Killer for a harrowing, unforgettable experience that questions the very nature of evil.