Allegations that bikie supergrass Sid "Snot" Reid confessed to a murder and boasted he had set up another man for the crime have been investigated by a special police operation that will report to State solicitors.
The State Solicitor's Office, which is preparing legal advice on bikie associate Gary Ernest White's petition for a fresh appeal into his conviction for the 2001 murder of Anthony Tapley, is awaiting a report from Operation Stirling after asking last February to investigate further.
Attorney-General Michael Mischin has revealed that officers involved in Operation Stirling have been investigating the allegations that another person had confessed to the murder and conducting a comprehensive review of the murder investigation that led to White's conviction.
Two high-security prisoners who have served time in protective custody with Reid have claimed the bikie boasted of committing the murder and fitting up White for the crime.
Reid is serving a reduced 15-year sentence in special protective jail conditions after confessing to his part in planting the car bomb that killed former CIB chief Don Hancock and his friend Lou Louis in Lathlain in 2001.
White lodged an original petition pleading for his case to be sent back to the Court of Appeal in August 2009, but the emergence of additional information has been partly responsible for delaying the process.
White's lawyer, Gary Massey, said he respected the need for a careful investigation but the delay was becoming frustrating given it had been more than three years since the original petition was lodged and his client had spent more than 10 years in jail.
"We are not asking and we have never asked the police to prove Gary's innocence, we are just saying that information has come to light since his appeal which warrants the Court of Appeal deciding whether it should go back to a retrial," Mr Massey said.
A spokeswoman for Mr Mischin, who has the discretion to grant the fresh hearing by the Court of Appeal, said the State Solicitor's Office would be in a position to provide advice on White's petition after receiving the police report.
WA Police acting assistant commissioner of State crime Graeme Castlehow confirmed Operation Stirling had been set up to review and investigate the case.
Mr Castlehow said a report on the investigation's findings was being prepared and would be provided to the State Solicitor's Office "early this year".