Offenders with Autism Spectrum Disorder: A Clinical Case Series and Diagnostic Considerations in Forensic Psychiatry

Purpose: Autism spectrum disorder (ASD) is increasingly recognized in adulthood, including in forensic settings, where its diagnostic and medico-legal implications remain insufficiently defined. Current evidence does not support a simple association between ASD and offending; rather, offender presentations in autistic individuals appear heterogeneous and are likely shaped by the interaction between core autistic features, intellectual and adaptive functioning, comorbidity, developmental adversity, and contextual stressors. Participants and Methods: This clinical-forensic case series describes seven offenders with ASD assessed within the Italian forensic psychiatric context. The cases encompassed multiple offending domains, including homicide, stalking, and persecutory acts, alleged sexual offending, property-related offending (arson), and domestic abuse. In several instances, ASD was identified for the first time during forensic evaluation in adulthood, often in the context of atypical presentations, variable cognitive functioning, and overlapping psychiatric or personality features. Results: Across cases, offending-related conduct appeared to arise through different psychopathological and developmental pathways, including rigidity and restricted interests, social naivety, impaired contextual understanding, concrete or idiosyncratic interpretations of interpersonal situations, emotional dysregulation, interpersonal vulnerability, and co-occurring psychopathology. The series also highlighted substantial diagnostic challenges in forensic practice, particularly where autism had remained previously unrecognized. These findings suggest that the forensic relevance of ASD lies not in diagnosis alone, but in the specific way autistic characteristics interact with cognition, adaptation, and contextual demands in shaping the behaviour under examination. Conclusion: This case series supports the need for a clinically integrated, developmentally informed, and individualized forensic psychiatric assessment of offenders with ASD. Standardized instruments may be informative, but only when interpreted within a broader formulation incorporating developmental history, cognitive and adaptive functioning, psychiatric comorbidity, and contextual factors. Improved recognition of underdiagnosed or atypical adult presentations may enhance diagnostic accuracy and support more appropriate decisions regarding criminal responsibility, risk management, and treatment planning.