Peniamina v The Queen

This case concerned an appeal to the High Court of Australia by a man convicted of murder. The appellant had killed his wife and sought to rely on the partial defence of provocation under s 304(1) of the *Criminal Code* (Qld). However, s 304(3) of the *Code* excludes this defence in cases of unlawful killing of a domestic partner where the sudden provocation is "based on" anything done, or believed to have been done, by the deceased to end or change the relationship. The appellant contended that the exclusion in s 304(3) was confined to situations where the conduct relied upon as provocation was itself the act that changed or ended the relationship.

The central legal issue before the High Court was the proper construction of s 304(3) of the *Criminal Code* (Qld). Specifically, the Court had to determine whether the exclusion of the provocation defence under s 304(3) was limited to cases where the conduct of the deceased, relied upon as causative of the accused's loss of self-control, consisted of an act aimed at changing or ending the relationship. The Court also considered whether the operation of s 304(3) was a question of law.

The High Court reasoned that the phrase "based on" in s 304(3) indicated a broader connection than merely the immediate trigger for the loss of self-control. The Court held that the exclusion in s 304(3) applied where the accused's loss of self-control was founded upon, or motivated by, the deceased's conduct related to ending or changing the relationship, even if the immediate provocative act was something else. To interpret s 304(3) as being confined only to the specific act of provocation relied upon by the accused would, the Court found, allow an accused to manipulate the defence by selecting a different "trigger" for their loss of control, thereby rendering the legislative exclusion ineffective. The Court concluded that the operation of s 304(3) was a question of law, not merely a matter of forensic choice for the accused.

The High Court allowed the appeal, setting aside the order of the Court of Appeal of the Supreme Court of Queensland. The Court ordered that the appeal to that Court be allowed, the appellant's conviction be set aside, and a new trial be had.