It's nearly a year since three-year-old William Tyrrell went missing without a trace and police are seeking help to identify several cars seen at the scene of his disappearance.
On that morning William's mother spotted two cars parked across the road from her mother's house in the small NSW mid north coast town of Kendall.
Detective Inspector Gary Jubelin said police are keen for information about two cars in particular - an old dark grey sedan and an old white station-wagon - that were parked opposite the grandmother's home.
"They were parked between drive-ways - it's a rural area out there and it's a dead end street so it's a very unusual place to have two vehicles parked in the manner that they were.
Det Insp Jubelin said there's no logical explanation as to why they would park in that location.
"They were very close to each other, given it was a dead end street, that raises our curiosity," he told the Network Nine's 60 Minutes program.
Police are also investigating a dark green or greyish coloured sedan believed to have driven past as William was riding his bike and a 4WD seen driving at speed in the Kendall area shortly after the boy vanished.
"We would like to speak to the occupants of those vehicles to determine the reason they were in the area," Det Insp Jubelin said.
William, who would now be four, went missing from his grandmother's backyard on September 12 last year.
His mother made a triple-zero phone call, telling the operator her son had been "roaring around the garden" in his Spider-Man outfit just before he went missing.
She says her family had been looking for him up and down the street for around 20 minutes.
"We heard him roaring around the garden and then I thought, `Oh, I haven't heard him, I better go check on him'," she said, in the audio released by police on Monday.
William's mother says she hadn't noticed any suspicious people in the neighbourhood and it was the first time her son had gone missing.
Investigators believe William, who was waiting for his dad to arrive at the home, may have run down toward the road when a pedophile took the opportunity to snatch him.
Kendall locals Janina Richardson and Dale Symons expressed their heartache and disbelief over William's disappearance.
Ms Richardson, the organiser of Saturday's Walk 4 William, which marks 12 months since his disappearance, said the new information released provide vital clues.
"We want to keep William's face out there to try and bring him home to his mum and dad," Ms Richardson told Network Seven.
Mr Symons said the local area was covered with pictures of William.
"We just need his name out there, his face out there and that is what we are doing."
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