Lord Lucan's son launches court bid to declare him dead

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

Heir wants death certificate for his father - who would now be 90 - to bring mystery of his disappearance to a close 

Lord Lucan's son and heir, George Bingham argues the document would close a mystery that started with the disappearance of his father shortly after the death of the family's nanny.