Karl Karlsen's life is thrown into disarray when his wife is killed in a house fire. However, years later suspicions are raised when his son dies in another freak accident. After a lengthy trial, Karl is convicted of the murder of his son and previous wife and issued with a lengthy prison sentence. Now, infamous broadcaster Piers Morgan sits down with Karl to hear his side of the story. Piers Morgan interviews eight of the most infamous murderers in the US, but can they convince him they’re innocent? Featuring some of the nation’s most fiercely contested cases, exclusive interviews, and sensational revelations...these convicted killers all have one thing in common; they insist they are innocent.