A prior conviction obtained after trial is admissible in subsequent criminal proceedings in WA as evidence of the material facts comprising the elements of the offence, irrespective of whether the conviction was obtained on a guilty plea or after trial. Per Buss JA, those facts are incontrovertible as between the Crown and the accused by operation of res judicata. The question of the limits of incontrovertibility — including whether the prosecution may augment the facts of conviction with additional evidence, and the permissible scope of cross-examination — was expressly left open. On propensity evidence, temporal remoteness is not determinative of admissibility under s 31A; where a gap in offending is followed by further offending, the court may infer the predisposition persisted.
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