Six weeks on from the disappearance of Owami Davies, the Metropolitan police say they still have 40,000 hours of footage from CCTV cameras and other devices to go through in its search for the student nurse.
If not quite seeking a needle in a haystack, the force insists it is devoting huge resources and elite detectives to finding one person in a city of more than 8 million, unsure if any crime has been committed.
