Powch v The Queen

The High Court of Australia considered the appeal of Powch against the conviction entered against him in the Supreme Court of Queensland. The dispute concerned the appellant's conviction for the offence of unlawful sexual intercourse with a girl under the age of 16.

The central legal issue before the High Court was whether the trial judge had erred in law by failing to direct the jury that the prosecution bore the onus of proving beyond reasonable doubt that the complainant was under the age of 16 years at the time of the alleged offence.

The High Court unanimously allowed the appeal, quashing the conviction and ordering a new trial. Their Honours held that the prosecution bore the onus of proving every element of the offence, including the age of the complainant, beyond reasonable doubt. The failure to so direct the jury constituted a material misdirection, rendering the conviction unsafe. The legal principle applied was that the onus of proof in criminal matters rests with the prosecution, and this onus extends to all essential elements of the offence charged.