R v Trebeck

In the matter of R v Trebeck, the appellant was convicted of murder following a lengthy trial. The prosecution’s case against the appellant was circumstantial, lacking any direct evidence of motive, and instead relied heavily on the appellant's post-offence conduct. The appeal centred on whether the trial judge adequately directed the jury on the use of evidence regarding the appellant's lies and other post-offence conduct. Specifically, the court needed to determine if the judge's directions allowed the jury to appropriately consider the possibility of manslaughter as an alternative to murder.

The primary legal issue was whether the trial judge's directions to the jury were sufficient to ensure that they could properly assess the evidence of the appellant's lies and post-offence conduct. The appellant's counsel argued that the judge's directions allowed the jury to consider these lies and conduct as evidence of guilt of murder, without properly considering whether they could only indicate a consciousness of guilt of manslaughter. The Crown, however, contended that the judge's directions, particularly the Edwards direction, were adequate in context and that the case of R v Mitchell could be distinguished. The court had to examine whether the judge's failure to properly direct the jury on the use of lies and post-offence conduct constituted a miscarriage of justice.

The Court of Appeal held that the appellant's conviction should be set aside and a retrial ordered. The court found that the trial judge did not properly direct the jury on how they should assess the evidence of the appellant's lies and other post-offence conduct. The judge failed to instruct the jury that they could only consider such evidence as proof of murder after excluding the possibility that it indicated a consciousness of guilt of manslaughter. This omission potentially allowed the jury to convict the appellant of murder without adequately considering the lesser charge of manslaughter. Consequently, the court concluded that this error likely influenced the jury's decision, amounting to a miscarriage of justice.

The final orders of the court were to set aside the conviction and order a retrial, reflecting the need for the jury to be properly directed on the assessment of post-offence conduct as evidence in the context of a murder trial.