Police have no new leads in 2007 Corryn Rayney cold case

Police say they have no new leads after a cold case review into the 2007 death of Supreme Court registrar Corryn Rayney.

Rayney disappeared after a bootscooting class on August 7, 2007 and her body was found buried in Perth’s Kings Park days later.

Her husband, Lloyd Rayney, was acquitted in 2012 of murdering the Supreme Court registrar because of a lack of evidence and a subsequent appeal was dismissed.

WA Police Commissioner Karl O'Callaghan said the team engaged in Operation Delve had spent the past 12 months on the case.

He said as part of the investigation, thousands of electronic files and 420 archive boxes had been assessed, 92 people had been investigated, and dozens of forensic scenes had been examined.

DNA or fingerprints were also taken from a further 300 people.

"Despite the volume of work undertaken, there is currently insufficient evidence to charge any person in relation to Corryn Rayney's murder," Comm O'Callaghan said.

"Irrespective of the absence of any criminal charge, what I have been delivered is a properly conducted and thorough investigation.

"The officers have done their best and it is terribly disappointing we weren't able to identify the person or persons responsible for Mrs Rayney's murder and provide much needed answers for her family."

He said all current available leads had been exhausted and that Rayney's murder remained an "unsolved homicide".

The case will now transition to the Special Crime Squad where investigations will continue.