While one driver has helped police with their inquiries, the second driver has never been found.
The ongoing investigation into the fatal hit-and-run will feature on Police Ten 7 tonight, as police continue to hunt for the second vehicle involved.
"We hope tonight's Police Ten 7 episode will help us to get the answers we need for Nelson's whanau and friends," Detective Sergeant Glen Burrell said.
"We encourage people to watch the show and get in touch with any information they may have."