Two drivers who ran over Israel Jack as he lay on Te Ngae Rd have been interviewed by police.
The 20-year-old was found dead at 4.25am on August 18. He had been hit by two cars as he lay on the road.
What he was doing there is one of the many unanswered questions surrounding his death, which police are now treating as suspicious.
Detective Senior Sergeant Zane Smith said the drivers of both cars had since been spoken to. The first driver had only recently contacted police after seeing reports of the death in the media.
"Because of the area and their position on the road they just haven't appreciated that it was actually a person that they've hit," Mr Smith said.