The longest running cold case of a law enforcement officer in the United States was the murder of Sheriff's Lt. Joe Clark - shot execution style in his own home. Given his tough stance on drug crime, detectives become convinced his death is the beginning of a drug war. It takes 33 years for them to discover the truth.

A 17-year-old girl from a small Kentucky town goes missing, then is found strangled two weeks later; a police investigation into the crime uncovers a terrible family secret.