An anonymous phone call to the parents of a man thought to have been murdered in 2001 gave new information, but his body has still not been found.
But Philip Cowan of Napier is still missing after disappearing more than a decade ago on a trip to Wellington.
He had been a promising student at Victoria University's design school, but dropped out as he became involved in the drugs scene.
While his body was never found, three men were charged with being involved in his murder, but they were freed after their trial was aborted part-heard because of legal issues.
After Mr Cowan's family's hunt for the truth regarding Philip's disappearance featured in an episode of 60 Minutes in late 2011, his father Simon Cowan received an anonymous phone call.