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Two men arrested at the scene of Connor Morris' death in Auckland have appeared in court, on charges not related to Mr Morris's death.
They faced charges of outstanding fines and breach of community work.
Police said the men were no longer in custody and their accounts were only part of what the investigation team was working through to piece together the circumstances of Mr Morris's death.
Police said today that Mr Morris - the long-time boyfriend of Millie Elder-Holmes, the daughter of veteran broadcaster Sir Paul Holmes - was struck in the back of the head by an as-yet unidentified weapon.
He was pronounced dead while being transported to hospital.
It has been reported that the weapon used in the attack was a machete, however police have said today that at this stage, that is speculation.
Although a weapon is believed to have been involved, exactly what type of weapon is still yet to be determined, and investigations around the weapon and its whereabouts are ongoing, police said.
A white Honda car was towed from the scene last night which will also be examined.
Today, police said Mr Morris' body has been returned to his family.
No-one has yet to have been charged in relation to Mr Morris's death and no-one else was in police custody.
The forensic scene examination on Don Buck Road has continued throughout today as investigators continued to gather evidence, police said.
Police said investigations were ongoing, and they were working hard to ensure all possible lines of enquiry are covered, with a team of more than 30 detectives working on the investigation.
Anyone who can help police can do so anonymously, by calling the Crimestoppers line on 0800 555 111.
Information can also be given to the Operation Venice team by calling the Henderson Police Station on 09 839 0600.