Grace Millane, Murray Mason, the Lundy family - all these names are synonymous with some of New Zealand's most horrific disappearances and murders.
Why did they happen? Were the perpetrators ever caught?
Journalist and author Steve Braunias has followed 12 of these cases closely and captures them all in his new book Missing Persons.
Braunias spoke to The AM Show about the novel, and the mysteries behind New Zealand's most infamous cases.
Watch the full interview.