Armstrong v The State of Western Australia

The appeal before the court was brought by the appellant, Armstrong, against the State of Western Australia, challenging the sentence imposed by the sentencing judge, E M Heenan J. The appellant was convicted of manslaughter, and the issue at hand was the appropriateness of the sentence, with a specific focus on whether the sentencing judge made an express error of law by considering an incorrect maximum penalty for the offence.

The court was tasked with determining whether the sentencing judge's consideration of an erroneous maximum penalty constituted an express error of law that warranted setting aside the sentence and re-sentencing the appellant. The court examined the sentencing principles and the relevant statutory provisions to assess the impact of the error on the overall sentence. The court was required to decide if the error was significant enough to affect the fairness and appropriateness of the sentence imposed.

In reaching its decision, the court found that the sentencing judge indeed made an express error of law by considering an incorrect maximum penalty. The court held that this error was material, as it influenced the overall sentence. Consequently, the court set aside the sentence imposed by E M Heenan J and resentenced the appellant to eight years' imprisonment with eligibility for parole commencing on 29 January 2012. The appeal was allowed, and the original sentence was quashed in favour of the new sentence.