Specter (2017)

Legendary private investigator Sam Specter tracks down an alleged child molester in an attempt to dole out his own version of justice. As the night wears on and the confrontation turns violent, Specter realizes this was never about the supposed crime, but about something much more elusive and sinister. As the two face off in the dead of night, they discover a series of dark truths that neither of them can escape.