For impaired mental functioning to reduce moral culpability in sentencing, evidence must establish a real connection between the mental condition and the offending; the mere existence of PTSD or depression is insufficient. A period of non-offending between offences and sentencing does not demonstrate substantial rehabilitation where the offender maintains distorted views about the offending and lacks full acceptance of responsibility, though full acceptance of responsibility is not a precondition for rehabilitation as a matter of principle.
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