The man found dead in Auckland's Orakei Reserve on Saturday has been named as 36-year-old Socksay Chansy.
Mr Chansy recently returned to New Zealand after a long period living overseas.
Police are appealing for sightings of Mr Chansy who was last seen in Auckland on April 25 in Grafton, before his body was found on Saturday in the Okahu Bay reserve.
"Mr Chansy was estranged from his family and we believe he had been living and sleeping rough in the central Auckland area in the days or weeks following his last confirmed sighting on April 25," Detective Senior Sergeant Paul Newman said.
"We're hoping that by releasing his photo someone will recognise him and may be able to let us know if they had seen him in Auckland since April 25."
A post mortem examination was carried out yesterday however further tests will be required before a cause of death is determined.
"We're continuing to treat his death as unexplained. The inquiry is focusing on the Orakei and Mission Bay area, with a view to identifying people who have been sleeping in the reserves and may have seen or come into contact with Mr Chansy," Mr Newman said.
"We're very interested to hear from anyone who had dealings with Mr Chansy and who can shed some light on his movements these past few months."
Anyone with information can contact Glen Innes Police on 09 524 1936 or information can be provided anonymously to Crimestoppers on 0800 555 111.