Viewers of Lord Lucan documentary say the investigation was 'a waste of time' as they missed out a key detail

Viewers of BBC Lord Lucan documentary have slammed the investigation as 'a waste of time' as they missed out a key detail until the end. Richard John Bingham – better known as Lord Lucan – vanished into thin air, from East Sussex, just one night after the family's nanny, Sandra Rivett, had been found bludgeoned to death in their home in Belgravia, London in 1974. BBC viewers are all saying the same thing about the Lord Lucan investigation- that is was 'a waste of time' Yesterday, a three-part documentary on the gruesome murder, titled Lucan, aired On BBC Two on the 50th anniversary of Rivett's death, her son Neil Berriman was compelled to find answers after learning who his real mother was, following the death of his adoptive mother One person said: 'The BBC asks the question why does the Lord Lucan story hold so much power today? BBC cameras followed Neil as he tracked down the man he believed to be the missing aristocrat, now living in Australia Neil accused 'Old Etonian' Christopher Bell, 87, of being Lucan and of having killed his mother in 1974, before going on the run for decades 1963: John Richard Bingham, Earl of Lucan, and Veronica Duncan pictured after their marriage On the same evening, the young children's nanny, Sandra Rivett, was found dead in the familial home. She had called the police after being attacked by her husband on November 7, 1974 Over the years, a bitter feud ensued between the remaining family and it was reported that Veronica didn't speak to her three children for more than 35 years How bludgeoned Lady Lucan was one of the last people to see Lord Lucan alive before he disappeared Detectives believe Lord Lucan intended to murder his wife and killed the nanny by mistake John Bingham, the 7th Earl of Lucan, vanished after the body of nanny Sandra Rivett was found at the family's London home on November 7, 1974.