The family of murdered Supreme Court registrar Corryn Rayney have dismissed calls for an independent cold-case review of the police investigation.
Ms Rayney's sister Sharon Coutinho and father Ernest Da Silva said they believed detectives were working hard to solve the case and felt buoyed by reports that police were getting closer to catching her killer.
As relatives and friends gathered to mark the third anniversary of Ms Rayney's death this month, Ms Coutinho said the family continued to be frustrated by the time taken for forensic reports.
However, Ms Coutinho dismissed calls by the Labor Opposition and others for an independent forensic review.
"We have been told by the (Operation) Dargan team that there has been some peer review of the forensics and other aspects of the investigation," she said. "We are regularly briefed by the police and believe that their tireless and unconditional efforts will solve this heinous crime."
Police Commissioner Karl O'Callaghan told Seven News last week that the Dargan team was still working hard on the case.
"What I can tell you is that there is a full team of detectives working on this matter at major crime," Mr O'Callaghan said. "There is still a lot of forensic work being done on this crime and we will continue to do that until we get an outcome."
Ms Coutinho said it was difficult to believe that three years had passed since her only sister's death.
"Each day actually gets harder, not easier, with time," she said.
"All our emotions about losing Corryn are just below the surface. A fleeting thought or memory of her brings back the horror of what has happened to her.
"Our greatest concern is for Corryn's two beautiful girls who have to live the rest of their lives without their mum."
Mrs Rayney was a highly regarded and popular member of the Supreme Court team.
She went missing after a boot-scooting class in Bentley on August 7, 2007 and the 46-year-old's body was found in Kings Park about a week later.
Barrister Lloyd Rayney has denied any involvement in his wife's murder and is suing the WA police for defamation for calling him the "prime suspect" in the case.
The defamation action is continuing.
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