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Australia's most notorious disgraced cop will die in jail after failing in his bid to have his murder conviction overturned.
The High Court rejected Roger Rogerson's leave for appeal on Friday after Chief Justice Susan Kiefel said there was no reason to doubt the decision of the NSW appeals court.
Rogerson's lawyers argued his inability to adequately cross-examine fellow former detective Glen McNamara hurt his defence case.
Both Rogerson, 80, and McNamara, 62, were jailed for life in 2016 for the cold-blooded execution of drug dealer Jamie Gao in 2014.
Rogerson has argued his innocence, saying he was unaware of McNamara's plans.
His lawyer, Madeleine Avenell SC, said the cross examination was beyond simply discrediting McNamara as a witness.
She said the defence had been stripped of the chance to prove McNamara had it in for Rogerson and was determined to implicate him in the murder.
"It's beyond just a 'don't accept this person's evidence'," she told the High Court.
"The inability to cross examine ... gave rise to a miscarriage of justice."
The Crown argued that the case didn't rely on McNamara's evidence to prosecute Rogerson, instead relying heavily on CCTV footage.
Sally Dowling SC asked the judges to look at the strength of the prosecution case, which they determined was strong enough to strike out the appeal.
The NSW Court of Criminal Appeal previously concluded Rogerson's case for overturning his conviction was "completely lacking in credibility and did not raise any doubt about his guilt".
