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 the background of the episode could be his missing wife
2018: Police prepare another brief for the NSW Director of Public Prosecutions. The Australian launches its podcast, The Teacher’s Pet, about the case
December 5, 2018: Queensland Police arrest Chris Dawson at the home of his twin brother. He is expected to be extradited to NSW and charged with Lyn’s murder.