Christy Mangan set up the Garda cold case unit to examine some of the state's most troubling unsolved killings. Now, he takes a deep dive into how investigations are run. This book includes the extraordinary story of Charlotte and Linda Mulhall - dubbed 'the Scissor Sisters' - who killed and dismembered their mother's abusive boyfriend, and how Mangan elicited a full confession from Linda. A gripping account of murder in high society - the 1985 death of Fr Niall Molloy - has a striking analysis of why mishandling of the case led to so many conspiracy theories. And Mangan's description of gang warfare in Drogheda, and the 2020 killing of teenager Keane Mulready-Woods, is as tense as a thriller. It is also a chilling warning of what happens when criminals get their hooks into a community.