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Updated: May 5, 2026

Animal Models of Depression - Chronic Despair Model CDM
Published on: September 23, 2021
Depressed but not legally mentally impaired
1Monash University, Melbourne, Australia.
Abstract:
This article examines the mental impairment (insanity) defense in the Australian state of Victoria and argues that the defense is successful only when offenders suffer from psychotic mental illnesses. This raises the question about how non-psychotic offenders are dealt with by the courts when they claim 'mental impairment' for serious acts of violence such as homicide, particularly when a relatively large number of perpetrators involved in homicide suffer from non-psychotic illnesses like depression. The analysis shows that depressive illnesses do not reach the threshold for mental impairment (legal insanity) such that they mitigate violent criminal behavior, although they can, arguably, diminish culpability. This article draws upon existing literature, qualitative analysis of two court cases and semi-structured interviews with four legal representatives to make its conclusions.
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