Hi everyone 🙂 I remember watching a movie somewhere in the 2010s. The general theme was very dark and I don’t remember much I only remember a few scenes.

It was this young man who comes to live with his aunt (or his uncle’s wife idk), He’s cold blooded, I think he was a psychopath, and he starts fancying his aunt and murders a man who bothered her (or maybe he was covering for her, not sure) and the only scene I remember clearly is that he beat the lie detector that the police made him take.

I don’t know how the movies ended or what happened after that. I appreciate your help 🙂