R v Sheard

The case of R v Sheard arose in the Supreme Court of Victoria, where the defendant, Sheard, was on trial for the murder of another inmate in a gaol. The dispute centred on whether Sheard had acted in self-defence when he fatally stabbed the deceased with a shiv. The Crown sought to introduce evidence suggesting Sheard had a tendency to possess shivs in gaol and use them to assault other inmates. This evidence was intended to establish tendencies that could indirectly support the argument that Sheard was not acting in self-defence.

The legal issues before the court were whether the proposed tendency evidence was relevant and whether it had sufficient probative value to outweigh its prejudicial effect. Under the common law rules governing evidence, tendency evidence is admissible if it has significant probative value and is not substantially prejudicial. The court had to determine if the evidence of Sheard's past behaviour with shivs could assist in resolving the ultimate issue of self-defence. Given that the evidence was capable of establishing the tendencies alleged, the critical question was whether it had significant probative value in the context of the specific issue of self-defence.

The Supreme Court held that while the evidence could establish the tendencies claimed by the Crown, it did not have significant probative value concerning the ultimate issue of whether Sheard acted in self-defence. The court found that the probative value of the tendency evidence was substantially outweighed by its prejudicial effect, leading to its exclusion from the trial. Consequently, the court ruled that the tendency evidence was inadmissible as it did not assist in resolving the key issue of self-defence and risked unfairly prejudicing the jury against Sheard.

The final orders of the court excluded the Crown's proposed tendency evidence. This decision underscored the importance of balancing probative value against prejudicial effect in the admissibility of tendency evidence, particularly in cases where the ultimate issue is self-defence. The trial proceeded without the contested evidence, focusing solely on the circumstances surrounding the fatal stabbing and Sheard's claim of self-defence.