Debbie Malone says she knows exactly what happened to missing mother-of-two Lyn Dawson after she was last seen on Sydney's northern beaches 36 years ago.
According to Malone, Mrs Dawson has given her all the disturbing details in a series of graphic messages from beyond the grave.
The psychic medium claims Mrs Dawson was murdered and buried under lime and carpet on the Bayview bushland property she shared with her school teacher husband Chris, perhaps near a retaining wall.
What is more, Malone believes Mrs Dawson can see her husband wilting under the pressure of being publicly blamed for her murder and is enjoying the spectacle.
Malone is in contact with members of Mrs Dawson's family who believe what she has told them about the 33-year-old's disappearance and ultimate fate.
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Debbie Malone is a psychic medium who has tried to help Lyn Dawson's family learn what happened to the missing mother-of-two. She believes Lyn was killed and buried in 1982
Lyn Dawson was a devoted mother whose family say would never have left her two children. She is pictured here with daughter Shanelle, who was four when the nurse disappeared
The former Dawson family home in Gilwinga Drive, Bayview. A pink cardigan which had belonged to Lyn Dawson was found when police searched an area near the swimming pool
Malone, who claims to have helped solve some of the nation's most baffling murders, has helped Mrs Dawson's family's search for the truth of what happened to the registered nurse.
Her first contact with the family came after the ABC's Australian Story aired an episode on the mystery in 2003 when producers of that show put her in touch with Mrs Dawson's siblings.
Malone had seen only the last 10 minutes of the program but felt an immediate connection with the missing woman and felt she could probably help.
'After I watched the end of it she was with me. She wouldn't leave me alone. Lyn started talking to me.
'As soon as I started watching I just thought she was around me. She started to fill in the missing pieces about what had happened to her.'
Mrs Dawson has been missing since January 1982 when according to her then school teacher husband Chris she walked out for a short break from their marriage.
That marriage was in dire trouble, with Chris engaged in an affair with babysitter Joanne Curtis, with whom he had been having sex since she was his 16-year-old student at Cromer High.
Chris Dawson has always denied having anything to do with his wife's disappearance and has never been charged with any crime. He now lives near Noosa on Queensland's Sunshine Coast
Chris and Lyn Dawson with their daughter Shanelle. Lyn has been missing since January 1982. Psychic Debbie Malone believes Mrs Dawson was buried somewhere near the family home
Joanne Curtis (centre) with her school teacher lover Chris Dawson's children Shanelle and Sherryn. Ms Curtis babysat the girls then became their stepmother when she married Chris
After Mrs Dawson disappeared, Joanne Curtis moved into the family's home, becoming stepmother to the couple's daughters Shanelle, four, and Sherryn, two.
She later married Chris Dawson and they had a daughter, Kristen. That marriage ended when Joanne left 28 years ago.
Two coroners have since found that Mrs Dawson is dead and recommended her husband be prosecuted for her murder.
The case has been the subject of regular media attention including television shows such as Australian Story but has gained international attention through a recent podcast series.
The Teacher's Pet, produced by The Australian newspaper, has been downloaded more than 17million times and reignited public interest in Mrs Dawson's death.
Malone bills herself as 'Australia's No 1 psychic detective' and has used what she says is an ability to talk to the dead to help police investigate other murders in the past.
She is the author of books including Clues From Beyond (2017) which had a chapter on the Dawson case removed before publication due to legal reasons.
Debbie Malone accompanied Lyn Dawson's siblings Pat Jenkins and Greg Simms to the Bayview property (pictured) where she believes the missing mother-of-two is buried
Her latest work is Always With You, 'a collection of true love stories from beyond the grave.'
'These incredible true Australian stories explore questions about the human soul and spirit world, as Debbie shares powerful messages from departed loved ones on the other side to bring comfort, closure and healing,' the publisher states.
Malone says she has assisted police forces across Australia in missing persons and murder investigations for the past two decades, giving bereaved families messages from the dead.
1970: Lynette Joy Simms marries footballer Christopher Michael Dawson. They are both 21 and later have two daughters, first Shanelle and then Sherryn
1980: Mr Dawson, who retired from playing rugby league to become a PE teacher, starts affair with 16-year-old pupil Joanne Curtis at Cromer High School on Sydney's northern beaches
1981: Mr Dawson persuades Mrs Dawson to let Joanne move in to their home to get away from her violent stepfather and finish her Higher School Certificate
December 1981: Mr Dawson and his young lover run away together to Queensland but Ms Curtis changes her mind and they return to Sydney
January 8, 1982: Mrs and Mrs Dawson go to marriage counselling. Mrs Dawson's mother speaks to her daughter, who is not a big drinker, on the telephone and thinks she sounds 'sozzled'.
January 9, 1982: Mr Dawson says he dropped his wife at a Mona Vale bus stop so she could go shopping at Chatswood. Mrs Dawson fails to turn up to meet her mother, husband and children at Northbridge Baths. Mr Dawson says his wife rang him and said she needed some time to herself
January 10 or 11, 1982: Mr Dawson picks up Joanne from South West Rocks on the mid north coast of NSW and she moves into his home. He reports his wife missing six weeks later.
1983-85: Mr Dawson divorces his missing wife and marries Joanne. The newlyweds move to Queensland where Joanne has the couple's daughter Kristen
1990: Mr Dawson and Joanne split up. She moves back to Sydney and urges police to search his old garden for a body
2000: Mrs Dawson's pink cardigan is found during a police dig on the family's former property at Bayview
2001 and 2003: Two coroners find that Mrs Dawson was murdered by a 'known person' - Chris Dawson - but he is not charged with any offence
2006: An episode of the British TV series Antiques Roadshow is filmed in Padstow, Cornwall. Mr Dawson later claims a woman seen in