In the early hours of September 10, 2011, Danai Muhammadi and an accomplice used a garden spray to start a blaze that killed his estranged wife Melissa Crook, his father-in-law Mark Crook and his own baby, 15-month-old Noah Crook. Britain’s Darkest Taboos tells the stories of some of the most shocking and disturbing crimes within families and relationships. Every family’s worst nightmares are relived and re-told in unflinching detail by those left behind – by the families and friends, and by others whose lives have been touched - like the police officers and reporters involved in the cases. Each episode also includes expert analysis from former Detective Superintendent David Swindle and psychologist Emma Kenny. Each series looks into how the ones you trust the most can commit the most disturbing of crimes.