Police have found an old hessian bag buried about one metre under the ground on the sixth day of the search for the remains of missing three-year-old William Tyrrell – as officers say the dig could go on for months.
Police are focusing on three potential covert burial sites within 700m of William’s late foster grandmother’s home in Kendall, on the NSW mid north coast.
The three-year-old was last photographed on the balcony of the property in 2014.
The frayed green nylon bag was found in a deep hole police have dug at Area 1 of the Tyrrell dig and was inspected, mapped with evidence marker ‘F’ and placed into an evidence bag.
The spot where it was found is near a tree trunk which has interested specialists on site, in particular anthropologist Dr Penny McArdle.
Police have found an old hessian bag (pictured) buried about one metre under the ground on the sixth day of the search for the remains of missing three-year-old William Tyrrell
The frayed green nylon bag was found in a deep hole police have dug at Area 1 of the Tyrrell dig and was inspected, mapped with evidence marker ‘F’ and placed into an evidence bag
The hessian bag is the sixth piece of evidence found in the search for William’s remains and has interested forensic officers
A rarely seen picture taken minutes before the last time William Tyrrell’s foster parents saw him, playing with his sister on his foster grandmother’s balcony
It is the sixth piece of evidence police have found since beginning the search for the missing toddler’s body on Monday.
The find came as police have confirmed that the dig could now take months and will cover an area up to one square kilometre.
Police told Daily Mail Australia on Saturday that forensic hydrologist and layers expert Professor Jon Olley and graves specialist Dr Tony Lowe had advised excavators to scrape off dirt down to a layer 15 and 30cm below the surface.
‘He’ll be in there,’ a police spokesman said the scientists have told officers working on the scene.
‘Between half a foot and a foot down and once they get down through the top soil into the orangey clay they know that’s well into seven years down.
‘They are scraping back seven years (of dirt).’
Police are seen examining garden beds at the property where three-year-old William Tyrell went missing
The search for the remains of missing three-year-old William Tyrrell is entering its sixth day. Forensic scientists have told police ‘he’ll be in there’ as they dig up bushland near his late foster grandmother’s home
The major development comes after police dug up and raked through dirt and drained a shallow creek in an area of bush a kilometre from the property on Friday.
A piece of fabric was collected from the creek-bed and placed in an evidence bag.
The discovery created immediate interest, with a police officer taking a camera, evidence bag and gloves to meet forensic specialist Professor Olley.
A find two hours earlier of a fabric sample by the same pool had been immediately discounted by the professor.
But on the second occasion, he spent up to 10 minutes with the officer as she photographed it in situ, donned gloves, poured a liquid on the item and bagged it in a a brown paper evidence pack.
The latest evidence was found on the right side of a stagnant end of the creek drained last night.
The light blue-coloured piece of fabric, measuring roughly 8cm x 8cm will be taken back to the NSW Forensic Medicine headquarters in the Sydney suburb of Lidcombe.
Police have revealed the renewed search for the remains of missing three-year-old William Tyrrell could take months as they dig up one square kilometre of bushland
On Thursday, Australian Federal Police officers brought in ground-penetrating radar to scan a concrete slab at the property.
The slab was laid after he disappeared.
But on Friday morning police confirmed results from the slab had not furthered the investigation.
It comes after Strike Force Rosann officers investigated theories William may have fallen from a balcony at the property.
Earlier this week police also seized a Mazda that previously belonged to the foster grandmother, who has since died.
Police also charged the boy’s former foster parents over an unrelated alleged assault on a different child.
The pair are due to face court at Hornsby on Tuesday.
The findings of a coronial inquest into William’s disappearance, which concluded last year, are yet to be handed down.
A $1 million reward for information on the case still stands.
Police examine a patch of bushland near to the house where William Tyrrell went missing in 2014 assisted by forensic graves expert Dr Tony Lowe (centre)