In 2021, the nation was rocked by the murder of Sarah Everard by a serving police officer. Wayne Cousins’ conviction of this horrific crime has eroded public trust in the police and left the nation wondering, can they really rely on those sworn to protect? Cops Who Kill lifts the lid on eight cases of murder and betrayal by police officers in Britain and around the world. In each episode, TV personality and actor Will Mellor is joined by experts, including ex-Detective Superintendent Julie McKay, psychologist Serena Simmons, and ex-Murder Detective Howard Groves, to try to unravel how and why a police officer switches from law enforcer to lawbreaker, how they were finally brought to justice, and the horrendous consequences for all concerned.