Livestream: Jacinda Ardern addresses media on Wally Haumaha's future

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Jacinda Ardern has called a press conference on Thursday to discuss Wally Haumaha's future after a damning Independent Police Conduct Association (IPCA) report - and says she won't remove him.

The IPCA began its investigation after receiving three complaints about DC Haumaha's behaviour, including claims he had bullied two women from the Ministry of Justice and Corrections who were working on a joint project with police.

Earlier, the Prime Minister said she was getting advice from the Solicitor-General over what actions she could take.

The report, released on Thursday, found his behaviour was "inappropriate and unprofessional" and "unnecessarily autocratic".

"He exhibited intimidating and humiliating behaviour," the report states.

"DC Haumaha showed a lack of judgement in expecting an autocratic management style to get the best from an inter-agency team."

National leader Simon Bridges has called it a "damning report" and says Ms Ardern needs to take responsibility.

"It was Prime Minister Jacinda Ardern who appointed Wally Haumaha. She now has to take responsibility and dismiss the man that she appointed to one of the most senior and powerful roles in the country," he says.

"It would be unconscionable for Mr Haumaha to stay in this constitutionally important role given the seriousness of the IPCA findings."