The abolition of defensive homicide : a step towards populist punitivism at the expense of mentally impaired offenders

The offence of defensive homicide was abolished in Victoria in November 2014, following a widely held perception that it was being abused by violent men. While primarily associated with battered women who killed in response to prolonged family violence — but who were unable to establish their offending as self-defence — a less publicised rationale underpinning the introduction of defensive homicide was to provide an alternative offence for offenders with cognitive impairments not covered by the mental impairment (formerly the insanity) defence. Cognitive impairments are complex and varied in their nature and symptomatology. Offenders presenting with cognitive impairments therefore require an appropriate range of legal responses to capture the nuances and appropriate moral culpability of their conduct. Drawing from an analysis of the cases of defensive homicide heard over its 10–year lifespan, this article contends that the abolition of defensive homicide did not adequately take into consideration the potential impacts on individuals whose mental conditions are not typically covered by the restrictive mental impairment defence. We further argue that the decision to abolish defensive homicide was driven by dominant, populist voices, without sufficient attention given to the offence’s potential to achieve the aims underpinning its enactment, including providing an alternative offence for women who kill in response to prolonged family violence.