The two-year investigation into the unsolved murder of Jane Furlong has officially been wound down by police.
Operation Darlia, the homicide inquiry into the 1993 disappearance of the 17-year-old, will no longer be actively investigated as of June 30.
Furlong's remains were found buried deep beneath sand dunes at Port Waikato's Sunset Beach in 2012, 20 years after she was reported missing from Auckland's Karangahape Rd.
She had been due to give evidence in two trials, against a serial sex offender and in a gang-related court case.
Despite thousands of man hours and a $50,000 reward offered for information, police have been unable to make a breakthrough.