Police investigating the deaths of Raymond and James Fleet are combing through rubbish at Rotorua's landfill.
About 15 staff have been at the spot south of Rotorua on State Highway 30 since Wednesday and will continue over the next week.
Raymond Fleet, 51, and his nephew James, 25, were reported missing on August 9. Their bodies were found eight days later in the Mamaku Forest.
Detective Senior Sergeant Mark Van Kempen said: "Police are currently carrying out a search at the Rotorua Landfill as part of the investigation into the deaths of Raymond and James Fleet.
"Around 15 staff are searching for items which may be of interest to the investigation."