Director of Public Prosecutions v Lyons and Lyons (Ruling No 4)

In the case of Director of Public Prosecutions v Lyons and Lyons, the respondents, the Lyons, were charged with the murder of the deceased, Ms. Smith. The respondents' conduct post-offence, including their lies about the disappearance of the deceased and their assistance in disposing of the body, formed a significant part of the prosecution's case. The matter was heard in the Supreme Court of Victoria, where the respondents sought to exclude their post-offence conduct on the grounds that it was intractably neutral.

The court was required to determine whether the respondents' post-offence conduct was inextricably intertwined with their guilt or innocence for the murder charge. Specifically, the court needed to assess whether their lies and actions regarding the disposal of the body were so closely linked to the offence that excluding them would render the case against them unviable. The respondents argued that the prejudicial effect of this evidence outweighed its probative value.

The court examined the nature and extent of the respondents' involvement in the disposal of the deceased's body and their subsequent lies to authorities. It was noted that the respondents' conduct was not merely neutral but actively contributed to obscuring the truth and hindering the investigation. The court concluded that the post-offence conduct was not intractably neutral as it provided significant context and reinforced the inference of their guilt. Consequently, the court ruled that this evidence could be admitted.

The court ordered that the post-offence conduct of the respondents be admitted as evidence in the trial for the murder of Ms. Smith. The respondents' application to exclude this evidence was dismissed.