An argument that an offender's moral culpability should be reduced on the basis of an indirect causal link between the offence, drug addiction, and an underlying mental disorder must be rejected. Where an offender suffers from a mental disorder, the disorder is not to be treated as a mitigating factor because it explains the offender's recourse to drugs. Voluntary drug-taking will only constitute a mitigating factor in the rare circumstance where the offender had no foreknowledge of the mental state that would be induced.
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