To Kill or Not to Kill

A known paedophile is tortured and murdered, another has disappeared within days of his prison release for abducting a 6 y/o girl. Joseph Lidahl is called out of suspension & set to find the missing man, with no clues and only half the story. Is treally missing and the murderer, or is he another victim, and if so who is the killer. The father of the child is convinced she's still alive. Is she?