They’re unsolved mysteries which grip Britain – high profile cases which cause agony for families and frustration for police.
Lee Boxell, the 15-year-old from South London whose disappearance led to the longest and costliest forensic dig in Met police history.
Claudia Lawrence, a chef who set off for work and has never been seen again. And Luke Durbin, whose disappearance after a night out in Ipswich led investigators deep into the world of drugs and county lines violence.
No bodies have ever been recovered, so are these much-loved sons and daughters still missing, or were they murdered?