Twenty years have passed since Kayo Matsuzawa was murdered and her killer is yet to be caught, however, detectives investigating the killing have a new lead.
It was revealed on TVNZ's Cold Case that unknown male DNA was located under Matsuzawa's fingernails, a key bit of evidence that was missed in 1998.
A Japanese tourist, Matsuzawa came to New Zealand in 1997 to study in Christchurch and on September 11, 1998, she came to Auckland to explore the city.
Matsuzawa checked into a backpackers on Fort St before heading out, never to return.
![Japanese woman Kayo Matsuzawa. Photo / Supplied](https://www.nzherald.co.nz/resizer/v2/SYADQARB4P2262UJSMED4SRCDQ.jpg?auth=6a35e165ef786e9b33cb6d747c58eacc6e823033941b513beea8a34abfdfff0a&width=16&height=12&quality=70&smart=true)