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In a case described as “shrouded in secrecy,” a man in New Zealand has been found not guilty of murder by way of insanity twice after committing two separate homicides ¹. The first killing occurred over two decades ago, during which he was ruled legally insane and designated a “special patient” under New Zealand’s Mental Health Act—a status reserved for individuals deemed a high risk to public safety due to severe mental illness.

Despite being subject to psychiatric oversight, the man committed a second homicide, reigniting legal proceedings. Courts once again determined he lacked the capacity to distinguish right from wrong at the time of the crime, resulting in another NGRI (not guilty by reason of insanity) verdict. Under New Zealand law, such rulings typically lead to indefinite detention in a secure psychiatric facility rather than prison, prioritising treatment over punishment.

Legal and Ethical Dilemmas

The case has sparked debates about the intersection of mental health and criminal justice ². While NGRI verdicts are rare—accounting for less than 1% of homicide cases globally—they often provoke public outcry due to perceptions of leniency toward violent offenders. Critics argue that repeat NGRI rulings, like this one, expose gaps in long-term psychiatric care and risk assessment.

In New Zealand, legal insanity is determined by whether the defendant could comprehend the nature of their actions due to a “defect of reason” caused by mental illness. Forensic experts likely testified about the man’s chronic mental health struggles, such as schizophrenia or psychosis, to support the court’s decision.

Public Reaction and Media Coverage

Media reports emphasise the case’s sensitivity, with limited details disclosed to the public—a common practice in New Zealand to protect legal proceedings involving mental health. However, this secrecy has fueled frustration among advocates for transparency and victims’ families.

Globally, high-profile insanity cases often reinforce stigmatising narratives linking mental illness to violence, despite evidence showing most individuals with severe mental health conditions are not violent. In this instance, the man’s dual NGRI rulings may further polarise public trust in the legal system’s ability to balance justice and safety.

Broader Implications

This case underscores systemic challenges in managing mentally ill individuals who commit violent crimes. While NGRI verdicts prioritise clinical care over incarceration, they raise ethical questions about accountability and societal risk. New Zealand’s approach—focusing on rehabilitation through psychiatric detention—reflects broader debates about whether current laws adequately address repeat offences by those deemed legally insane.

As details emerge, the case is likely to reignite calls for reform in mental health policy, forensic psychiatry, and legal frameworks governing insanity defences.

Sick systems and sick patients

The failures of mental health systems in the UK, as highlighted by cases like that of Valdo Calocane, reflect broader systemic issues where inadequate care and socioeconomic neglect contribute to tragic outcomes. Valdo Calocane, who committed multiple homicides while under community mental health supervision, has reignited debates about whether current systems prioritise cost-cutting over safety. Similar concerns were raised in a 2025 SANE report, which criticised “failures of person-centred care” in mental health policies, arguing that restrictive practices and underfunding create environments where tragedies are more likely ³.

Research underscores that people with mental illnesses face a disproportionately high risk of homicide, both as perpetrators and victims. For instance, a study found that 22% of homicidal deaths in a cohort of over 7 million adults involved individuals with mental disorders, emphasising their vulnerability ⁴.

Critics argue that systemic failures—such as poor coordination between mental health services and the criminal justice system—exacerbate risks. Inspections in England have repeatedly flagged “poor support” for mentally ill individuals navigating the legal system, with failures in early intervention and long-term care ^{5 6}. These gaps are compounded by socioeconomic deprivation, which critics note is often overlooked in favour of biomedical models that ignore the social determinants of mental health. As one analysis states, “they’re not mentally ill, their lives are just shit,” highlighting how poverty, trauma, and unstable housing fuel crises ⁷ contribute to an abundance of mental disorders.

Conclusion

Ultimately, the phrase “sick systems and sick patients” encapsulates a growing consensus: without addressing structural inequities and investing in holistic, community-based care, cycles of violence and neglect will persist.

1. Man found not guilty of murder by way of insanity twice after two separate killings | RNZ News
2. https://www.health.govt.nz/system/files/2024-11/special-patients-and-restricted-patients-nov24.pdf
3. SANE responds to independent mental health homicide investigation – SANE
4. People with mental illness at highly increased risk of being murder victims | The BMJ
5. Criminal justice system failing people with mental health issues – with not enough progress over the past 12 years – Criminal Justice Joint Inspectorates
6. NEWS: The Criminal Justice System is failing people with mental ill health | Inquest
7. “They’re not mentally ill, their lives are just shit”: Stakeholders’ understanding of deaths of despair in a deindustrialised community in North East England – https://www.sciencedirect.com/science/article/pii/S1353829224001746