Ex-rugby league player Chris Dawson has been arrested and is expected to be charged with the murder of his wife.
The 70-year-old was arrested on the Gold Coast on Wednesday morning and taken to Southport Police Station.
The cold case is the subject of popular podcast "The Teacher's Pet", which details a troubled marriage leading up to the disappearance and examines the shortcomings of the police response.
In September, police dug up the Dawsons' old home in Bayview on Sydney's northern beaches, but did not find any trace of Lynette Dawson's body.
Additional evidence collected during the investigation which lead to the arrest was made up of mostly witness statements, NSW Police Commissioner Mick Fuller told reporters on Wednesday.
"They were predominantly statements from witnesses that helped us to tie pieces of the puzzle is together", he told reporters.
"We spoke to the family of Lynette Dawson this morning, who were certainly relieved to hear this result and from their perspective, they have asked for some patience in terms of their confidentiality in going forward", he said.
Dawson denies killing his wife, and says she left home at the time of her disappearance to get some time to herself.
"Without a body, without knowing first of all whether in fact she is dead, without knowing secondly if she is dead, how she died, it's very hard to mount a case of a reasonable prospect of conviction just on motive and the undefined existence of means and opportunity".
Once he returns to NSW he will be formally interviewed by police, and is expected to be charged with her murder.
Through his duty lawyer, Mr Dawson tried to obtain bail so he could voluntarily go to New South Wales today to face court.
In what appears to be a clear reference to hit podcast series The Teacher's Pet, he said those additional statements "were the by-product of the media and the work that the media has done".
It has highlighted the bungled handling of Mrs Dawson's case by police in the early years after her disappearance, prompting a recent apology from the state's police commissioner.
The magistrate said the crown alleged domestic violence allegations against Mr Dawson would be raised in evidence, as well as evidence from the woman involved in the affair - Mr Dawson's former student Joanne Curtis.
The commander of the NSW homicide squad, Detective Superintendent Scott Cook, said he was "confident" in the case.
Lynette Dawson disappeared in 1982. Her husband reported her missing six weeks later. "I wouldn't have written to the DPP otherwise", he said.
"We have to also ensure Chris gets due process".