The brother of a convicted paedophile, who was once a person of interest in the disappearance of William Tyrrell, has suggested where the child might be buried.

William, 3, disappeared from the garden of his foster grandmother’s home on Benaroon Drive, Kendall, on September 12, 2014, becoming Australia’s most notorious missing person’s case.

During a ten day operation, local residents and emergency services searched the rural township for the young boy: looking in forests, creeks and paddocks.

William has not been found in the then years since he vanished.

Several theories were floated during the inquest into his disappearance held by the NSW Coroner’s Court between 2019 and 2024.

This included allegations William’s foster mother hid his body after he ‘died from a fall’ out of fear she would lose access to another child in her care.

The foster mother, who cannot be identified, has repeatedly denied any involvement in William’s disappearance.

Another person of interest during the inquest was Frank Abbott, 84, who is currently in prison for sexually assaulting two girls and a boy.

Three-year-old William Tyrrell (pictured) was last seen over 10 years ago in the garden of his foster grandmother in Kendall, on the Mid North Coast of New South Wales

A man living in Abbott’s old house in Johns River, near Kendall, told news.com.au’s investigative podcast Witness: William Tyrrell that Frank’s brother Jeffrey – or ‘Bluey’ – allegedly shared a potential location of William’s remains.

‘He always said, when the stories were going around with (William) Tyrrell, that he didn’t do it,’ the man said.

‘Pretty close to when he died, Bluey said to my son, “He’s buried up on Big Bird Mountain there, where that big tree is”.

‘No one ever checked that out.’

The Bird Tree, one of two of the largest blackbutt eucalyptus trees in NSW, is a popular landmark and picnic area around Kendall in the Middle Brother National Park.

Daily Mail Australia does not assert or infer that Abbott was responsible for William’s disappearance or death, but simply has relayed Jeffrey’s alleged claims.

The second man at Abbott’s former house contested his father’s account of Jeffrey Abbott and his view on the case.

‘(Jeffrey) didn’t believe Frank had anything to do with it,’ he said.

Jeffrey Abbot, the brother of convicted paedophile Frank Abbott, reportedly claimed the remains of William are buried at popular picnic spot ‘The Bird Tree’

‘But I think he was under the belief that Frank needed the jail time.

‘He deserved to be in jail because of things he’d done in his past.’

Abbott lived in a caravan in the area when William vanished and was previously accused during the inquest of bestiality with a neighbour’s black Labrador.

The inquest also heard evidence Abbott had repeatedly boasted about how he ‘beat’ a murder charge in the 1990s.

In the 1990s, he stood trial twice over the 1968 disappearance of a 17-year-old girl, Helen Mary Harrison.

A first jury failed to reach a verdict, and a second acquitted him. Miss Harrison’s killer was never found.

Abbott’s notoriety as an unsavory character has been discussed in his previous home at Johns River.

The town’s former shopkeeper, Patrick Teeling, said to the Telegraph he was told: ‘Warn your kids, don’t let your kids go near him.’

Frank Abbott (pictured) was not questioned during an inquest by the NSW coroner’s court but was a person of interest during the investigation into William’s disappearance

He ‘didn’t have any scruples’, Mr Teeling said. ‘You wouldn’t feed him. Jail’s too good for him.’

Abbott was not questioned during the inquest and has privately denied his involvement in the disappearance of William.

‘Hundreds’ of people have been persons of interest in the investigation, with a detective describing it as a ‘very low’ threshold to meet.

The NSW Government’s notice of a $1million reward for information that leads to the recovery of William Tyrrell is still in force.

Daily Mail Australia has contacted NSW Police regarding claims William’s remains could allegedly be buried at The Bird Tree.

Any remaining submissions to the Coroner’s Court must be filed by May 30, before responses are handed up by June 13.

The Coroner will then set down a date to deliver her findings.