Coster said the informal briefing occurred in the back of a car as the pair travelled through the South Island.
Hipkins told Q+A that he had no recollection of the alleged conversation.
Coster also claimed he had told current Minister of Police Mark Mitchell earlier than the November 2024 date Mitchell has previously suggested.
“There is no way that I was only just telling him about all of this in my last couple of weeks in the job,” Coster said.
Mitchell posted a response on his Facebook page.
“It is disappointing that following his resignation, that came with an apology to police less than a week ago, Mr Coster is trying to deflect and relitigate matters. I firmly stand by all my statements and facts presented in relation to the IPCA [Independent Police Conduct Authority] report. Mr Coster’s recollections are wrong.
“I want to make very clear that Mr Coster never briefed me, either formally or informally, about Jevon McSkimming and Ms Z prior to 6 November 2024. I would note his recollections of disclosures in the IPCA report were often found to be inconsistent and unreliable.”
The minister then detailed his grounds for his formal briefing on the matter.
“Mr Coster was instructed by the PSC to brief me on the 6th of November it was not self-initiated by Coster. I rejected the narrative of the briefing that presented McSkimming as a victim. I immediately called a meeting with the PSC and the Solicitor General to bring forward my concerns.
“That meeting took place on the 7th of November the day after I had been briefed. If Coster had bought [sic] this forward to me at anytime earlier in 2024 then I would have immediately initiated the exact same actions.”
Tame asked why Hipkins would deny knowing anything and why Mitchell would say he only found out on November 6th if Coster had briefed him much earlier.
“You would have to ask them. But well, all I can say is no one wants to be close to this. This is really nasty and toxic, and, frankly, who would want to acknowledge being anywhere near it at any stage?” Coster replied.
Coster resigned this week from his role as the chief executive of the Social Investment Agency.
It followed a damning IPCA report into the way police handled complaints against McSkimming, published in November. Coster had been on leave since the report was published.
Former Deputy Commissioner Jevon McSkimming. Photo / RNZ, Mark Papalii
Coster said his decision to resign was a result of his “acceptance of full responsibility for the shortcomings identified in the Independent Police Conduct Authority’s review of the handling of complaints against Jevon McSkimming during my tenure as Commissioner of Police”.
“I regret the impact on the young woman at the centre of this matter and sincerely apologise to her for the distress caused.”
The allegations were made by a woman, with whom McSkimming had an affair, over a number of years.
The woman, dubbed Ms Z because of suppression orders, spoke exclusively to the Herald about the “ongoing nightmare” she had suffered at the hands of the former Deputy Police Commissioner.
She had sent hundreds of anonymous emails over years, alleging McSkimming was a sexual predator who had groomed her.
While McSkimming had admitted a consensual affair with the much younger woman – she was 21 at the time, he was 42 – he denied the allegations and claimed she was motivated by revenge.
Senior police did not investigate the allegations, which continued as McSkimming sought the role of Police Commissioner, the most senior role within the police. The IPCA report noted the former police executive prioritised McSkimming’s ambitions in the force above investigating the complaints.
For years, that narrative was accepted by McSkimming’s supervisors, who instead used the emails as evidence to prosecute Ms Z amid McSkimming’s intention to replace outgoing Police Commissioner Andrew Coster.
McSkimming resigned in May after the discovery of objectionable images on his police devices, including child exploitation and bestiality material.
He pleaded guilty to charges related to that material and awaits sentencing.
During the Q+A interview, Coster was asked why he should be trusted.
“I acted honestly. I acted in good faith. My judgments were wrong and I accept that, but, the thing that’s really grated on me, and part of the reason why I didn’t jump straight to resignation, is it was very important for me to have it acknowledged that the report does not find corruption,” he said.
“It does not find cover-up. It does not find collusion, and those conversations that have played out publicly, without me or anyone being able to respond effectively, has maligned a group of people who acted with the right intent, albeit they got the judgment wrong.”
Coster was also asked about Public Service Minister Judith Collins’ public comments made last month regarding corruption in the matter. “If it walks like a duck, and it quacks like a duck, it’s not looking good, is it?” Collins said during a November press conference.
“I couldn’t believe how aggressively the media on this was positioned from the outset,” Coster said.
“In positioning the report publicly, you had ministers and others implying corruption and sometimes expressly saying cover-up. If the independent body assigned to investigate these things has not found that, why would you position it publicly that way?”
Public Service Minister Judith Collins (centre), Police Commissioner Richard Chambers (left) and Police Minister Mark Mitchell during their press conference after the damning IPCA report into police handling of complaints against former Deputy Commissioner Jevon McSkimming. Photo / Mark Mitchell
Mitchell had also previously suggested on Q+A that Coster was leading a corrupt police executive – comments that he later withdrew.
“I was pleased the comments were withdrawn. They went well beyond what the report found and from my perspective, they are without basis,” Coster said.