Vengeance Unlimited S01E13 - Clique

Three popular elite friends who went too far in college fraternity house party toying with an unpopular guy, leading to the guy's murder by one of the three. Ten years later when the man's skull is found during a construction site excavation, and no surviving family, Mr. Chapel and KC are the only hope to solve the crime. Chapel goes undercover as mentally deranged man claiming to have witnessed the murder in hopes to bring justice.