Director of Public Prosecutions v Sheridan (a pseudonym) (No 2)

The Director of Public Prosecutions sought an advance ruling from the Court regarding the admissibility of evidence about the mental health of a complainant in a criminal trial. The defendant, referred to as Sheridan, was charged with sexually penetrating the complainant without her consent. The Court of Appeal of the Supreme Court of New South Wales was tasked with determining whether evidence of the complainant's mental health conditions, including her medication and the side effects of such medication, was relevant and admissible in the trial. This included an examination of whether the evidence was relevant only to the complainant’s credibility or had broader implications for the case.

The legal issues before the court encompassed the relevance and admissibility of the complainant's mental health evidence, particularly focusing on the side effects of her medication and the interaction of medication with alcohol. The court needed to consider whether the complainant's mental health conditions made her more likely to be impulsive and whether such evidence could be admitted without unfairly prejudicing the defendant. The court also evaluated whether the probative value of the evidence substantially outweighed the danger of unfair prejudice, and whether any prejudice to the prosecution could be mitigated through a jury warning.

The court held that evidence of the complainant's mental health and medication could be relevant and admissible if it had a bearing on the likelihood of her being impulsive or on any other material issue in the case. The court determined that the probative value of such evidence was not substantially outweighed by the danger of unfair prejudice. It was noted that any prejudice to the prosecution could be addressed through an appropriate jury warning. The court concluded that the evidence was not solely about credibility but had broader relevance to the case, making it admissible.

The final orders of the court were detailed in paragraph [63], which addressed the specific admissibility of the contested evidence in the context of the trial, ensuring that any prejudicial impact could be appropriately managed by the jury.