Childhood offending, adverse experiences and systemic failure: Findings from a NZ national birth cohort 2000–2019

Children with offending behavior are poorly understood. Administrative Integrated Data Infrastructure (IDI) data on almost 50,000 New Zealand children, from birth in 2000 until 2019, were analyzed to compare characteristics of offending behavior in children (under 14 years) against youth (14–18 years) and non-offenders. Only 1.5% of the cohort offended before age 14; yet, of those, almost two-thirds (63%) continued to offend (age 14–18) and did so significantly more often than teenage peers (p < .0001). A child abused before age 5 was six times more likely than a non-abused child to offend (as both a child and adolescent), despite early engagement with child-welfare services, and 1000s of ‘reports of concern’ about infants and children in the offending group. Being placed in out-of-home or state care did not interrupt offending but was associated with significantly more. Reports of abuse, neglect, self-harm and suicide indicators, and having a justice-involved parent, were all associated with higher rates of child offending and reoffending—not with effective interventions to help that child and their family. School suspensions, expulsions, and repeatedly changing schools were significantly associated with offending, as was financial hardship and deprivation. Overrepresentation of Indigenous Māori and ethnic-minority Pasifika children in poverty and the justice system reflected NZ’s wider patterns of social inequity and discrimination. Analysis was limited to data prioritized by the systems that are arguably failing these children and their families; instead, systems far more responsive to their needs should ensure children are effectively supported to leave the offending trajectory sooner.