Police are making progress in an investigation into the death of Auckland man Shannon Shelby Baker.
Mr Baker, 55, was found dead in his flat on Calgary St, Sandringham, on December 11 last year. Police say he was the victim of a violent assault and died in the early hours of the morning.
Detective Inspector Aaron Pascoe said a large number of police officers have been working to solve the case and have discovered he was visited and threatened twice before his death.
The first visit occurred on December 2, when two male offenders arrived at the property and threatened Mr Baker, before stealing some of his property, including Mr Baker's wallet.
The wallet has been described as a brown Hugo Boss travel wallet and may be adorned with a blue stripe.
Mr Baker was visited again by one of the offenders before his death, where the offender came to his address and threatened him again before leaving.
Det Insp Pascoe said they believe the incidents are linked to Mr Baker's death.
"The only item we have identified as being taken on the night of Mr Baker's death is the electronic key to his green 2001 Mercedes," he said.
"As a result of a comprehensive scene examination, we also believe there was more than one offender involved in his death."
Police are asking anyone who saw the wallet or key, or who saw anything suspicious on Calgary St around the times Mr Baker is believed to have been threatened or attacked.
"We also want to hear from anyone who saw suspicious activity on Calgary St, not only on the night of Mr Baker's death, but also on the 2nd and 6th of December," Det Insp Pascoe said.
"We believe there are multiple people who know who is responsible for the death of Shannon Baker and we urge them to do the right thing and contact us."
Anyone with information is asked to phone 0800 EPOPEUS (0800 376 7387) or email epEPOPEUS@police.govt.nz.
Information can also be provided privately to Crimestoppers on 0800 555 111.