In 2009, a man calling himself Peter Bergmann was found washed up on an Irish beach. Ten years later, police, journalists, and internet sleuths are still trying to work out what happened.
With austerity widening society's cracks, the number of people reported missing in London alone has increased 77 percent since 2010.
Eleven years ago, Andrew Gosden left home never to be seen again. Here, his father tells us about the family's efforts to track him down.
The bodies of missing people are rapidly turning up in Mexico
Is a jar of sweat that much better than an article of clothing?
Hundreds of thousands of people are reported missing every year, but most of us know very little about what happens next.
Almost 1,200 aboriginal women have gone missing or been murdered since 1952, which is twice as many than had previously estimated.
About 27,000 people have disappeared throughout Mexico between 2007 and 2013, according to officials.