Maurice Williamson and Police Minister Anne Tolley received early warning from police of potential issues around Donghua Liu under their "no surprises" policy.
Ms Tolley was told of the Herald's Official Information Act request, which prompted police acknowledgment of Mr Williamson's intervention more than two weeks ago, police confirmed yesterday.
Mr Williamson and Ms Tolley received more detailed information from police on Monday.
Police said they made a "brief mention" of Herald reporter Jared Savage's request seeking information about Donghua Liu in their weekly report to Ms Tolley on April 14 under the "no surprises" policy. No further details were given of the nature or scope of the request, police said.
On Monday this week - four days after police had declined Savage's request and he made an urgent appeal to the Ombudsman - they provided Mr Williamson with a copy of his request. They also told him they intended "to release relevant information with appropriate redactions to the NZ Herald and that a copy of the information to be disclosed will be provided prior to public release".