Drug-induced psychosis without underlying mental illness does not generally mitigate moral culpability because the offender is morally responsible for the self-induced condition. Exceptions exist where the offender had no awareness that the drug might trigger psychosis, or where the psychosis occurred during an attempt to withdraw from drug use. The critical question is what the probable consequences of ingestion were and whether the offender foresaw them. Tribal punishment and the additional hardship of imprisonment on traditional Aboriginal persons are relevant sentencing considerations but do not necessarily reduce the non-parole period where they have already been reflected in the choice of a less severe sentencing category.
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