ITV's Until I Killed You is based on the true story of Delia Balmer and John Sweeney who began dating in 1991 but their relationship took a sinister turn when Sweeney became violent ...
John confessed to killing an ex-girlfriend to Delia (Image: ITV/SCREENSHOT) In the clip, it depicts John's arrest and being escorted into a police vehicle after getting aggressive towards Delia; he is ...