The only female detective on the case reveals Lord Lucan's 10-year-old daughter's account of the murder and how the Clermont Set covered for him

Fifty years after the murder that shocked Britain, the Crown’s case against Lord Lucan was exclusively revealed in the Mail last week after we unearthed it in a confidential Scotland Yard document written in 1975. Sally Bower, pictured, was the sole female detective on the Lucan squad in 1974, aged 29 Lord and Lady Lucan and their daughter Frances in the garden of 46 Lower Belgrave Street Sally, now 78 and long since retired from the Met, was not just the sole female detective on the Lucan Squad, she was also the only woman officer in the whole of the Met’s A-division, which covered Westminster and Belgravia in 1974. Ironically, in this case they were the key witnesses.’ Four days after the Lucan nanny Sandra Rivett was bludgeoned to death in the basement kitchen at 46 Lower Belgrave Street, Sally was assigned to the inquiry by Detective Chief Superintendent Roy Ranson, author of the bombshell police report obtained by the Mail. She was hiding something without doubt.’ A police officer stands outside 46 Lower Belgrave Street in London, the home of John Bingham Lady Lucan decorates a Christmas tree with her three children Camilla, Frances and George She also recalls that her colleague Detective Sgt Graham Forsyth was the sole officer assigned to Lady Lucan - described in DCS Ranson’s report as a ‘highly strung’ but ‘truthful’ witness - throughout the inquiry.