“Milat…is alleged to have killed several women around the same time and in an area Lyn was seen,” Mr Dawson’s brother Peter said.
Serving seven life sentences, Milat’s victims were hitchhikers.
“[Lyn Dawson] didn’t drive,” he said.
However, former Assistant Commissioner Clive Small, who led the Milat investigation, believes it’s an unlikely theory.
“I would suggest it’s very much next to zero,” he told 7 News.
He says Milat kept souvenirs from his victims, and there were none from Mrs Dawson. He added that and the killers other victims were picked up around Liverpool.
“It doesn’t fit and I know no suggestion that Dawson was in the Liverpool area or what she’d be doing there,” Mr Small added.
