Where an offender's psychiatric condition is causally related to the offending, the Engert principles admit of the imposition of a sentence which would otherwise be outside the range, and it may be difficult to speak meaningfully of consistency in sentencing standards. A sentencing judge's decision to emphasise rehabilitation and treatment over deterrence in such circumstances is within the proper exercise of discretion and will be difficult to disturb on a Crown appeal. The departure from the statutory non-parole period proportion does not constitute impermissible 'double counting' of the psychiatric condition where the causal connection to offending is established.
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