Former West Australian police commissioner Karl O'Callaghan says a "quick and dirty" report claiming he presided over dysfunction including gambling, sexual harassment and misconduct aims to trash his legacy.
The independent review by consultant Ron Bogan describes a "toxic environment of fear" during Mr O'Callaghan's tenure.
Mr O'Callaghan, who retired in 2017 after 13 years as commissioner, swiftly rebutted the allegations on Wednesday.
"It doesn't have any evidence, it doesn't have any facts, it's based on the opinion of some disaffected people who didn't like the policing model," he told 6PR radio.
"I don't think this report has any credibility whatsoever."
Mr O'Callaghan said he was never interviewed and had not seen the report.
He denied allegations including "jobs for mates", an affair involving a senior officer and incidents of sexual harassment.
Allegations about problem gambling were referred to the Corruption and Crime Commission but there was no evidence to support the claims, he added.
In a statement, Police Commissioner Chris Dawson said an internal investigation into the allegations was reviewed by the CCC and "no findings of misconduct were sustained".
A CCC spokeswoman confirmed 18 allegations, some of which had previously been assessed, were examined.
Mr O'Callaghan said it was suspicious the Bogan report spanned 2013 - when Mr Dawson left the force - to 2017.
"It tries to distance the current commissioner from any involvement ... saying that we only lost leadership direction when he left," Mr O'Callaghan said.
The document had been available since 2017 but was only released following a Freedom of Information push by The West Australian newspaper, which the force opposed.
"It was never intended that the review be aired in this manner," Mr Dawson said.
But Mr O'Callaghan said it smacked of politics.
"If you want to discredit the police commissioner you're also trying to discredit the previous police minister (Liza Harvey), who of course is now the opposition leader," he said.
Ms Harvey took over the Liberal leadership last week.
Police Minister Michelle Roberts denied it was a political stitch-up, saying Mr Dawson had requested a "short, sharp review" when he was appointed and Labor had no idea when the opposition would change leaders.
"I'm disappointed Karl thinks there's some political interference and I can understand why he's upset," she said.
"It would have been better had he been provided with a copy."