What lord disappeared after his nanny was murdered?

The lord who disappeared after his nanny was murdered is Lord Lucan. In November 1974, he was implicated in the death of the family’s nanny, Sandra Rivett, and subsequently vanished, sparking a massive manhunt. His disappearance has led to numerous sightings and theories over the years, but he has never been found. The case remains one of the most infamous unsolved mysteries in British history.