R v RM

The case before the court involved the respondent, RM, who was charged with one count of sexual penetration of a child under 16 years of age. The issue before the court was the admissibility of expert evidence regarding the analysis of semen stains found on a bedframe in the complainant’s bedroom. The trial judge excluded the evidence, finding that it did not substantially depend on the witness’ specialised knowledge and skills, and instead relied on common knowledge and experience. The respondent appealed the decision on the grounds that the trial judge erred in excluding the expert evidence.

The court considered whether the evidence provided by the expert witness was based on specialised knowledge, as required under the relevant legislation. The court noted that the expert witness had provided evidence on the process of collecting and analysing the semen samples, which involved specialised knowledge. However, the court found that the contested issue was not whether the samples had been collected and analysed correctly, but rather how the semen had come to be on the bedframe. The court held that this issue did not substantially depend on the expert witness’ specialised knowledge, as it was common knowledge and experience that could be applied by a layperson. The court also found that the expert witness’ evidence did not provide a sufficient basis for the jury to conclude that the semen had been deposited by the respondent.

The court dismissed the appeal and upheld the trial judge’s decision to exclude the expert evidence. The court held that the evidence did not substantially depend on the expert witness’ specialised knowledge and skills, and instead relied on common knowledge and experience. The court also found that the exclusion of the evidence did not result in a miscarriage of justice, as there was other evidence available to the jury to reach a verdict. The trial judge’s decision was therefore affirmed.

The court made no further orders.