Video obtained by the Herald captures the moment a person was walking their two dogs on a nearby street before a series of six gunshots rang out in quick succession.
A vehicle’s horn could also be heard for a short period after the first gunshot.
The dog walker could be seen stopping and looking in the direction of the commotion before continuing up the street.
A woman who raced to the aid of the slain man described him as a doting grandfather who loved his grandchildren. She had no clue why he was targeted.
The Marvon Downs Ave resident, who wished to remain anonymous, said she ran out to the crashed courier van after hearing a volley of shots that sounded like “they were just outside [her] window”.
“I ran outside and saw our next-door neighbour’s courier van had driven into our neighbour’s fence.
“He got shot at the intersection [of Pixie Place and Marvon Downs Ave] and then his vehicle had rolled into the fence.
“As soon as I saw that, me and my partner ran over to see if he was still alive and if we could save him, but he was already gone.”
She believed the man, whom she would often wave to as he walked his dog, was in his 60s or 70s.
“He was a homebody … he loved his grandkids.”
National Party MP Simeon Brown said he was “horrified” by the shooting in his electorate.
“This will be incredibly disturbing for the community and neighbours,” Brown said.
Another Marvon Downs Ave resident earlier saidhe heard six gunshots.
A local told the Herald from the cordon that she also heard five or six gunshots.
“They were louder than a firework going off. It sounded like a pop.
“They all went off within a few seconds.”
Post Haste Couriers and Freightways have been approached for comment.
On Monday afternoon, Detective Inspector Shaun Vickers of the Counties Manukau CIB said: “The community can expect to see an increased police presence in the area today and in coming days as we work to piece together what has led to this and who is responsible.
“We are continuing to speak to a number of people in the area at the time and are keen to hear from anyone who hasn’t already spoken with us.”