Around 8000 people go missing a year in New Zealand, with 95 percent being found within 14 days.
But what happens when they aren't found? Investigative author Scott Bainbridge tells The AM Show about New Zealand's mysterious unsolved cases.
Watch the full interview with Scott Bainbridge above.
The AM Show with Duncan Garner, Amanda Gillies and Mark Richardson, weekdays 6-9am on RadioLIVE and streaming live to the rova app on Android and iPhone.