On a rainy October morning in 2004 Rachel O'Reilly, a 30-year-old mother of two, was brutally battered to death in her home. In the days that followed her shocking killing, it was thought that was the victim of a bungled murder attempt. But it soon emerged that the police thought that Rachel knew her killer, and that the murder had been planned for months. And, in a strange twist, Rachel's husband Joe admitted in a number of extraordinary press interviews, that he was a prime suspect...