A man who’s been told by police he’s a suspect in the presumed murder of his wife Colleen Adams has told 9NEWS he’s innocent.
Geoffrey Adams believes the young mother-of-two, who vanished more than four decades ago, is still alive.
It comes as Major Crime Police started a fresh search for her remains at the couple’s former home on South Australia’s Yorke Peninsula.
When 9NEWS asked Mr Adams whether police had told him he was a suspect, Mr Adams confirmed they had.
“All husbands are a suspect, yeah,” Mr Adams said.
When asked whether he did it, Mr Adam’s replied: “No, I didn’t.”
Two days ago, Major Crime detectives returned to the couple’s former Maitland home, where 24-year-old Mrs Adams was last seen on November 22, 1973.
Mr Adams said she had left voluntarily and that he last saw her getting into a car with an older woman he didn’t recognise.
“She was going through a bit of a difficult time, she was finding it hard to cope,” Mr Adams said.
Mrs Adams’ mother was the first person to report her missing, on December 19, 1973 – 27 days after she disappeared.
That missing persons file remained open until 1979, when the case was declared a Major Crime.
But this is the first large scale excavation of the family home and police have an element of confidence.
“We’re doing everything that we possibly can and all I can say is that we wouldn’t be committing this amount of effort to it if we didn’t think there was a possibility of solving this case,” SA Police Major Crime Detective Inspector Des Bray said.
The home is still owned by Mr Adams but is being leased to a young couple.
“I hope they find answers to give the family some closure and finally put her to rest,” resident Dylan Walker said.
Mrs Adams’ sister still questions why the young mother would have walked out on her two daughters aged just three and 18 months at the time.
“Very loving towards her children, she loved her two girls, and she was very close to her family,” Heather Johncock said.
She hopes this renewed search will finally lead to a breakthrough.
“Hopefully we’ll get some answers out of this, that’s all we’re asking for,” Ms Johncock said.
Mr Adams believes his wife is still alive.
“I just hope that she’s well and enjoying life yeah,” Mr Adams said.
© Nine Digital Pty Ltd 2018