The tiny town where William Tyrrell disappeared attracted sex offenders 'like mosquitoes', former senior detective Gary Jubelin has revealed.
The boy was three years old when he vanished from his foster grandmother's property on Benaroon Drive in Kendall, on the New South Wales mid-north coast, in September 2014.
Jubelin said police were stunned when they discovered 18 sex offenders were living in Kendall, with even more paedophiles and criminals lurking nearby.
In his new memoir I Catch Killers: The Life and Many Deaths of a Homicide Detective, Jubelin details how the quiet town became home to so many criminals, news.com.au reported.
The tiny town where William Tyrrell disappeared attracted sex offenders 'like mosquitos', former senior detective Gary Jubelin has revealed
'It's as if they've settled on this quiet, overlooked backwater like mosquitoes,' the homicide detective wrote.
Throughout the investigation Jubelin spoke to 18 known sex offenders who lived among the acre blocks and rural properties within a 30km radius of Benaroon Drive.
Beyond that, there were another 60 sex offenders in the area.
'There seem to be so many such offenders on this stretch of the Mid North Coast,' he wrote.
The Tyrrell case takes up much of the focus of the book with Jubelin exposing flaws in the investigation and his perspective of prying answers from people of interest.
Jubelin exposes details of his career beginning as a uniformed recruit to the Armed Hold-Up Squad, Gangs Squad, Homicide, to tactical policing and close personal protection.
He also details his personal life, writing about a troubled relationship with his father to his own personal romance and fatherhood.
In his new memoir I Catch Killers: The Life and Many Deaths of a Homicide Detective, Jubelin details how the quiet town became home to so many criminals
But William's disappearance continues to haunt him years later.
The former detective reveals the history of the investigation and the constant lack of resources police had.
He also delves into how police officers were overwhelmed in the early hours of the case, leading to evidence being missed.
'It's obvious how much was missed in those first hours and days when the local cops treated it as a missing-persons case and before Homicide was called in,' he wrote.
'Neighbours' houses were not properly searched, cars came and left the street where William disappeared without being checked, and no crime scene was established.'
Jubelin wrote about the interview with William's distressed foster mother, who told him she locked eyes with a man driving back and forth outside the home the day he went missing.
The former detective chief inspector is currently appealing convictions after being found guilty in April of illegally recording four conversations with Kendall man Paul Savage in 2017 and 2018.
Mr Savage, an elderly resident of the NSW mid north coast street where then-three-year-old William went missing in September 2014, had been a person of interest at the time.
William Tyrrell vanished from his foster grandmother's house on September 12, 2014
No one has been charged over William's disappearance. Mr Savage denies any involvement.
Barrister Margaret Cunneen SC on Thursday said the protection of privacy was the intention of the Surveillance Devices Act, the law under which Jubelin was convicted.
But in the case of the first three convictions, the NSW Supreme Court had already abrogated Mr Savage's privacy by issuing warrants allowing police to install listening devices in his home, she said.
'This was already not a private conversation because it could be listened to by any authorised officer,' she told Sydney's Downing Centre District Court.
The fourth tape of Mr Savage was made in December 2018 when the warrants had expired and when he invited Jubelin to his home.
Ms Cunneen said a police officer could have a lawful interest to protect his own personal interests, which were at risk given no third party was present.
'Surely that can't be the case,' Judge Antony Townsden said.
'The surveillance devices act has to apply to every person in the community.
'How could it be that any person, certainly a police officer, (make a recording) by simply asserting that something could occur, without advising anyone that they were to record that conversation?'
Ms Cunnen later said a court had previously ruled a person may record a conversation where they perceive a risk of later being called a liar or of fabricating conversations.
The former detective chief inspector is appealing his convictions after being found guilty in April of illegally recording four conversations with Paul Savage (left and centre) in 2017 and 2018
'Perhaps it is a greater interest for a police officer to prove he's not fabricating conversations,' she said.
'He wanted to make sure he had a record in case he was accused of something he didn't do.'
Another plank of the appeal contends magistrate Ross Hudson erred by making adverse findings about the adequacy of the investigation into Mr Savage.
Ms Cunnen said the judicial officer had slipped into the side-track of misapprehending the case as Mr Savage being 'in the dock facing a charge of murder' and Mr Jubelin as 'the overzealous policeman ... whose ears need to be clipped'.
'Mr Jubelin never arrested, never charged and never prosecuted Mr Savage,' she said.
Jubelin is also appealing his sentence - a $10,000 fine - should the conviction appeal fail.
Timeline of William Tyrrell's disappearance
Still missing: William Tyrrell vanished from his foster grandmother's home five years ago
September 12 - Dressed in a Spiderman outfit, three-year-old William Tyrrell goes missing from the garden while visiting members of his foster family on the NSW north coast.
September 21 - Police stop searching for the missing boy after scouring surrounding bushland and neighbouring houses.
January 20 - Police search the home and business of washing machine repairman Bill Spedding, who had been due to carry out repairs at the house at the time the three-year-old went missing.
Detectives take items for testing including a mattress, computer and vehicles. They drain his septic tank.
January 23 - The washing machine repairman publicly denies any involvement in William's disappearance and says he and his wife are on the verge of a breakdown due to the public attention.
February 19 - Homicide detectives take over the case and say it's likely William was abducted.
March 2 - Police fruitlessly search an area of bushland near Bonny Hills for three days after a tip-off.
April 17 - William's foster parents speak publicly for the first time in an emotional video released through police which does not identify them.
April 17 - Police say the boy may have been a victim of a paedophile ring.
September 6 - The Nine Network's 60 Minutes reveal two suspicious cars were parked on the street the morning William went missing.
September 12 - 'Where's William' week is launched one year after he disappeared.
September 12 - A $1million reward is offered for information leading to William's return.
August 24 - William's foster child status is revealed after a landmark court ruling.
June 12 - NSW Police announce the start of a four-week forensic search of bushland conducted by Strike Force Rosann.
June 14 - William's grandmother scolds police who have failed to find the young boy after four years, and claims their latest search is 'just for show'.
June 26 - The forensic search continues on what would have been William's seventh birthday.
June 27 - Strike Force Rosann announces it will move the search to an 800sqm block of bushland just 4km from where William was last seen alive.
June 5 - The latest search ends with Detective Chief Inspector Gary Jubelin saying the case could soon go to a coroner.
August - Investigation leader Detective Chief Inspector Gary Jubelin and a sergeant get into a disagreement during a briefing.
September 13 - Police reveal they found a burned out car wreck belonging to a former person of interest.
December 19 - Coroners say William could still be alive and the inquest will determine if he died or not.
February - DCI Jubelin is removed from the investigation amid a misconduct probe.
March 25 - The inquest into William Tyrrell's disappearance begins, with William's biological and foster parents appearing over the course of a week.
The inquest's first batch of hearings focused on William's family situation and the events leading up to his disappearance.
Both his foster and biological parents were quizzed, as were neighbours who helped in the search.
It was disclosed that William's biological parents absconded with him for six weeks in 2012, following a children's court order.
William's biological father slammed authorities for letting them down.
'Authorities f***ed up ... The minister had a duty of care to keep William safe until he was 18. That was not the case at all.'
May: DCI Jubelin quits the Police Force.
June: Four charges of breaching the Surveillance Devices Act are laid against DCI Jubelin. He denies any wrongdoing whatsover
August: The second tranche of inquest hearings began on Wednesday August 7
Inquest hears Bill Spedding, a NSW mid-north coast repairman and one-time person of interest in the disappearance of William Tyrrell, met his wife for coffee about 9.30am in Laurieton, a 15-minute drive from Kendall, on the day William went missing.
They then attended a school assembly across the road to see a child in their care receive an award.
The inquest heard how a man who claims he saw William Tyrrell unrestrained in the back of a speeding car on the day the child went missing was waiting for police to interview him to tell them what he saw.
He told the inquest he contacted police but did not hear back about an interview.
It took it took almost 1000 days before he was able to reveal what he saw to police.
The coroner orders an urgent probe into the final image that was taken on the day William vanished as metadata suggests the picture may have been taken 118 minutes earlier than originally thought.
The image has a 'created time' of 7.39am and a 'corrected time' of 9.37am, a new document from the 2000-page evidence brief.
The coronial inquest has been delayed for another eight months with the next round of hearings happening in March 2020.
November 11: The deputy state coroner releases footage of William Tyrrell and family at Heatherbrae McDonalds, on September 11, 2014
Feb - March 2020: Gary Jubelin defends four charges of illegally recording person of interest Paul Savage in court hearing
February 21: Daily Mail Australia reveals Frank Abbott was arrested in custody for the purposes of a police interview about William's disappearance
March 2020: The coronial inquest into William's disappearance resumes but stops with two days to go due to the coronavirus outbreak
April 6, 2020: Magistrate Ross Hudson delivers his verdict in Gary Jubelin case
April 8, 2020: Jubelin is convicted of all four charges and fined $10,000. Ex-cop says he will appeal
June 22: Police and SES launch new search for William Tyrell near Herons Creek, where Abbott once lived