Sergeant Kieran O'Regan was responsible for hunting down killers. Now he's become one of the dead: his decapitated body has been found in a graveyard, a tin whistle stuffed into his throat. He was due to give evidence at a trial for police corruption. His gruesome murder sends a clear message to whistleblowers: only silence is safe. In this latest DCI Katie Maguire mystery, uncovering the truth will depend on who Katie can trust.
