Inspector general will be inaugurated to oversee service after report on how top officers steered investigation of Jevon McSkimming, who went on to become deputy commissioner

New Zealand’s government will take the unprecedented move of appointing an inspector general of police after a damning report found “significant failings” in the way senior police officers handled serious sexual complaints against a former high-ranking officer.

The Independent Police Conduct Authority (IPCA) released a 135-page report on Tuesday detailing allegations made against the former deputy police commissioner Jevon McSkimming and the police’s response to them.

In a separate matter, McSkimming last week pleaded guilty to possessing child sexual exploitation and bestiality material.

Tuesday’s IPCA report said that rather than investigating allegations made against McSkimming, the police used accusatory emails sent by the complainant, known as Ms Z, to charge her with sending harmful digital communications.