Amanda Howard examines the worst crimes of Australia, the brutal kidnappings, rapes and murders that destroyed the innocence of a nation. Cases include Australia's worst serial killers, baby killer Kathleen Folbigg, the kidnappings of children Graeme Thorne and Sofia Rodriguez-Urrutia Shu as well as the brutal family murders carried out by Matthew De Gruchy and Sef Gonzales. Killer Australia looks at the motives and the complexity of the crimes and how the killers were brought to justice.