Police are offering a new $100,000 reward for help solving the murder of Auckland mother Katrina Jefferies.
Jefferies was 22 when her body was found in Waikowhai Reserve, Hillsborough in 2005. After its discovery police carried out extensive enquiries, however nobody has yet been charged in relation to her murder.
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Detective Inspector Uraia Vakaruru says police are not giving up hope of solving this case.
"We believe this is a solvable case and we know there are people out there who have vital information which will result in identifying those involved," he said in a statement.
"Next month will mark 14 years since her tragic death. We hope this new reward and the appeal for information on Cold Case will bring in new information from the public.
"Relationships and loyalties change over time and our hope is that someone who has knowledge of Katrina's fate, will ultimately do what's right for Katrina and her family and come forward to police."
Police said they'll pay up to $100,000 for information or evidence which leads to a conviction over Jefferies' death. Immunity from prosecution may be considered for any accomplice who gives this to police.
But despite the new effort by police, mother Nicola Jefferies says nothing can take away the heartache of losing her daughter.
"We want justice for Katrina and it pains me that her killer is still out there somewhere," she said in a statement.
"Our family want to move on and I still hold out hope that police will find who did this to Katrina."
Anyone with information should go to their nearest police station, call 0800 COLD CASE or email KatrinaColdCase@police.govt.nz.
Information can also be provided anonymously by phoning Crimestoppers on 0800 555 111.