"I make this appeal to these individuals - be brave and come forward and tell us what has happened. Police are here to establish the facts of the incident.
"This is a terrible tragedy so close to Christmas and the family is devastated in losing a loved one.
"Along with victim support services, police are engaging with and supporting the victim's family through this very difficult time."
Police are also asking for people to come forward with any information.
"These men who were at the victim's address will be known in the community and information on who they are and where they can be found is needed to help resolve the investigation," McKee said.
"This investigation has a team of 20 investigators who are focussed on gathering evidence and working with the community to resolve this tragedy.
"The Trentham community will see a visible presence of Police while we conduct our inquiry over the next few days.
"Police are working hard to establish the nature of the victim's death and to find the males who were at the scene and to establish who was responsible."
The Operation Archer investigation team is based at Upper Hutt Police Station and can be contacted directly or by ringing (04) 381 2000 or Crimestoppers anonymously on 0800 555 111.