An appellate court in Western Australia retains the power under the parity principle to reduce a co-offender's sentence to a manifestly inadequate level, as s 6(1) of the Sentencing Act 1995 (WA) does not bar such a reduction (per McLure P; left open by Mazza JA). However, the court will not exercise that discretion where the resulting sentence would be an affront to the proper administration of justice. The court was divided on whether the strength of the prosecution case is relevant to the guilty plea discount under s 9AA(2): McLure P and Mazza JA held it is relevant; Pullin JA held it is not.
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