"This afternoon we have advised Matthew Stevens' family and they are grateful that people will be held to account for his death.
"They have asked police to pass on their wish for privacy while they come to terms with the latest developments."
Ms Sears thanked the public for their help and willingness to come forward with information that had allowed police to piece together the events of that night.
"I continue to urge anyone with information that may assist with our ongoing inquiries to come forward and contact police."
Mr Stevens, 32, was last seen buying a six-pack of beer at a Lower Hutt supermarket at 10.30pm on November 27.
His body was found the next morning near his white Toyota Corolla in thick bush on a steep slope off Paekakariki Hill Road about 35km away.
Police at first thought his car had been abandoned but the inquiry was upgraded to a homicide when a post mortem examination showed Mr Stevens had died of stab wounds to his torso.
Anyone with information should contact the Operation Vintage team by calling (04) 381 2000. Information can also be provided anonymously via the Crimestoppers line by calling 0800 555 111.