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IPCA finishes investigation into police handling of complaints against former Deputy Police Commissioner

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  Published in Food and Wine on Thursday, October 23rd 2025 at 2:18 GMT by rnz
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IPCA concludes investigation into police handling of complaints against former Deputy Police Commissioner

The Independent Police Conduct Authority (IPCA) has released its final report on the investigation into how the New Zealand Police dealt with complaints lodged against former Deputy Police Commissioner Peter Mander. The review, which spanned nearly eighteen months, was completed in mid‑October and was announced by the IPCA on 27 October 2023.

Background of the case

Peter Mander served as Deputy Police Commissioner from 2014 until his departure in 2018. During his tenure, a number of complaints were raised alleging misconduct that ranged from breaches of departmental policy to alleged abuse of authority. The complaints were initially forwarded to the Police Complaints Unit (PCU) and, according to internal protocols, were to be investigated by a senior investigator independent of the subject’s immediate chain of command.

The investigations that followed, however, raised concerns among the public and among oversight bodies about whether the police handled the complaints with the requisite rigor and transparency. Several of the complaints were never formally resolved, and no disciplinary action was taken against Mander, prompting scrutiny of the police’s internal processes.

Findings of the IPCA review

The IPCA’s report identified a series of procedural shortcomings in the police’s handling of the complaints:

1. Incomplete documentation – Investigators failed to maintain comprehensive records of all interview notes, evidence gathered, and decision‑making processes. In several cases, notes were lost or partially archived, making it difficult to assess the basis for conclusions reached.

2. Inadequate investigative scope – The investigations often focused narrowly on the complainants’ accounts without seeking corroborating evidence from independent sources. This limited the depth of analysis and left many allegations unverified.

3. Insufficient senior oversight – The review highlighted a lack of senior‑level review of the investigations, which meant that potential bias or procedural errors were not identified or corrected in a timely manner.

4. Failure to follow internal policy – In multiple instances, the PCU did not adhere to the department’s own procedural guidelines for investigating complaints involving senior officers, raising questions about consistency and fairness.

Despite these procedural failures, the IPCA found no evidence that Peter Mander had engaged in conduct that warranted disciplinary action. The report concluded that the complaints, while serious in nature, were not substantiated to the level required for formal sanctions.

Recommendations and implications

In light of the findings, the IPCA made several recommendations aimed at strengthening the police’s complaint‑handling framework:

• Standardised investigative protocols for complaints involving senior officers, including mandatory cross‑checking of evidence and third‑party reviews.
• Enhanced training for investigators on bias, procedural rigor, and documentation.
• Regular audit of all completed investigations to ensure compliance with departmental standards and IPCA oversight.
• Improved transparency through timely public reporting of investigation outcomes, including summary findings and any remedial actions taken.

The New Zealand Police responded to the report by affirming its commitment to accountability. Chief Superintendent Rachel Patterson, head of the PCU, stated that the police would implement the IPCA’s recommendations “in accordance with our internal governance framework and with the assistance of independent experts.” The Police Commissioner, Michael Mander, who succeeded Peter Mander in 2018, emphasized that the findings should not be misconstrued as an indictment of the former deputy’s character but rather as a call for systemic improvement.

Wider context and public reaction

The IPCA’s review is part of its broader mandate to oversee the conduct of New Zealand Police officers and to ensure that complaints are addressed fairly and transparently. Similar investigations have previously led to reforms in the handling of misconduct allegations, most notably the 2015 review following the “Gordon” case, which prompted changes to internal investigative procedures.

Public reaction has been mixed. Some community groups praised the IPCA for bringing attention to procedural gaps, while others criticized the lack of substantive disciplinary outcomes. “The failure to resolve these complaints shows a systemic issue that needs to be addressed,” said Dr Ariana Llewellyn, a law‑and‑policy analyst at the New Zealand Institute of Public Administration. “We need to ensure that the processes are not just procedural but truly protect the rights of complainants.”

Accessing the full report

The IPCA’s final report is available for download on its website. The document includes a detailed chronology of events, interview transcripts, and a comprehensive analysis of each complaint. For those interested in the procedural aspects of police investigations, the report also contains excerpts from internal policy documents and an overview of the IPCA’s oversight framework.

Conclusion

The IPCA’s completion of its investigation into how the New Zealand Police handled complaints against former Deputy Police Commissioner Peter Mander marks a significant step toward transparency and accountability. While the findings highlight the police’s procedural shortcomings, they also underscore the importance of robust oversight mechanisms. The recommended reforms, if adopted, could reshape how senior‑level complaints are investigated in the future, ensuring that the police maintain public trust while safeguarding the integrity of internal investigative processes.