The statutory defences of self-defence (s 248), aiding in self-defence (s 250), defence against home invasion (s 244), and defence of property (s 254) under the Criminal Code (WA), when raised in civil proceedings via s 5 of the Criminal Code Act 1913 (WA), require the trial judge to make specific findings on each element, including the defender's subjective beliefs and the objective reasonableness of those beliefs. The common law defence of defence of another applies on the same principles as self-defence, requiring belief in the necessity of force and reasonable grounds for that belief in the circumstances as perceived by the defender.
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