West Australian police will again interview convicted Claremont killer Bradley Robert Edwards as they continue to investigate the slaying of Sarah Spiers.
Edwards was on Thursday found guilty of abducting and murdering childcare worker Jane Rimmer, 23, and solicitor Ciara Glennon, 27, in Perth in the 1990s but acquitted of killing 18-year-old secretary Ms Spiers, whose body has never been found.
WA Supreme Court Justice Stephen Hall said he was satisfied Ms Spiers, who disappeared after a night out in Claremont in 1996, had also been abducted and killed.
Justice Hall said the evidence showing Edwards' propensity for violent abductions made it likely that he was the killer of Ms Spiers.
But he said it could not be proved beyond reasonable doubt in the absence of any other evidence about the killer's identity.
Police Commissioner Chris Dawson, who embraced Ms Spiers' parents Don and Carol after the hearing concluded, has vowed the search for her body will continue.
"We want to find Sarah and we will never give up," Mr Dawson said.
"We will want to speak with Bradley further and we will."
Mr Dawson said the disappearance and death of Ms Spiers would remain a current investigation for homicide detectives.
He declined to comment on whether Edwards could potentially again be charged with Ms Spiers' murder if new and compelling evidence came to light, or whether he was considered a suspect in any other unsolved murders.
The Claremont investigation was the longest-running in the country, dealing with almost 18,000 suspects including those screened for DNA testing.
But Mr Dawson revealed the "curious fact" that Edwards was not among the thousands of suspects nominated by members of the public.
The verdicts have left more unanswered questions for Ms Spiers' parents Don and Carol but at least brought some comfort to the loved ones of Ms Rimmer and Ms Glennon
In a statement, family and friends of Ms Rimmer said they had endured 24 years of anguish at the loss of the "young, vibrant" woman.
"Jane had her whole life ahead of her, and it is almost beyond comprehension this could have ended in such horrific, heinous circumstances," the statement said.
"Our family can now take some comfort today and the healing process can begin."
Australian Associated Press