Ian Walters and his wife Tracy seem a normal, loving couple but in 2014 Ian drove his car off the motorway, putting Tracy into coma which ended her life. Her family talk for the first time in detail about the couple's troubled marriage and their fight to get justice for Tracy. Tracy's family warned her multiple times to leave the relationship but somehow Ian was able to talk her back. Her family then had to face him at her funeral, where he smirked at her sister after crying crocodile tears. 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.