AI-generated summaries. Not legal advice. Always verify against the official judgment on NSW Caselaw.
← All decisions
Court of Criminal Appeal 9 May 2014

R v Norris

[2014] NSWCCA 76

Sexual offences
CRIMINAL LAW CRIMINAL APPEAL ACT 1912, S 5F(3A) RULING VACATED

Citation: R v Norris [2014] NSWCCA 76
Court: Court of Criminal Appeal, NSW
Date: 9 May 2014
Judges: Beazley P at [1]; R A Hulme J at [2]; Bellew J at [35]

Background

The respondent faced trial in the District Court on a charge of sexual intercourse without consent. The Crown alleged he had intercourse with the complainant in the early hours of 20 April 2011 while she was asleep and incapable of consenting. The complainant was medically examined later that day, and swabs taken during that examination yielded DNA matching the respondent, a profile expected to occur in fewer than one in ten billion individuals.

The respondent, after initially denying intercourse, told police he had in fact had consensual intercourse with the complainant, but claimed it had occurred on 15 April 2011, five days earlier. That account was the central factual dispute at trial.

On the fifth day of trial, the Crown sought to call a forensic biologist from the NSW Forensic and Analytical Science Service to give expert evidence about the likely time elapsed since ejaculation, based on the presence of intact spermatozoa in smear slides prepared from the complainant's swabs. The trial judge excluded that evidence. The Crown then obtained a discharge of the jury and appealed the ruling under s 5F(3A) of the Criminal Appeal Act 1912 (NSW).

  • Whether the trial judge erred in excluding the forensic biologist's expert evidence about the likelihood of finding intact spermatozoa more than 72 hours after ejaculation
  • Whether the excluded evidence satisfied the requirements for admissibility, particularly relevance under s 55 and the expert opinion rule under s 79 of the Evidence Act 1995 (NSW)
  • Whether the exclusion "substantially weakened" the prosecution's case, as required for a Crown appeal to proceed under s 5F(3A) of the Criminal Appeal Act 1912 (NSW)

Decision

The Court of Criminal Appeal allowed the appeal, with counsel for the respondent appropriately conceding that the ruling was erroneous. R A Hulme J, with whom Beazley P and Bellew J agreed, explained the basis for that concession.

The trial judge had accepted that the forensic biologist, Ms Trabuio, possessed sufficient expertise under s 79 of the Evidence Act to give the opinion evidence. However, the judge then excluded it on relevance grounds, noting that the spermatozoa on the smear slides had not been independently DNA-analysed and could not be directly attributed to the respondent. The Court of Criminal Appeal found this reasoning erroneous because the judge failed to evaluate the evidence at its highest, and on the assumption that the jury would act on it. The only rational inference available, on the Crown's circumstantial case, was that semen found on smears derived from swabs carrying the respondent's DNA also emanated from the respondent. No alternative hypothesis existed.

Ms Trabuio's opinion was that it was "highly unlikely" to obtain intact spermatozoa on vaginal or vulval smears more than 72 hours after ejaculation, with her laboratory experience suggesting an upper limit closer to 24 to 48 hours. That evidence was directly relevant to the contested fact of when intercourse occurred, and its exclusion removed a body of proof capable of negating the respondent's claim that intercourse had taken place five days before the examination.

The Court also found the exclusion substantially weakened the prosecution's case, satisfying the threshold for a Crown appeal under s 5F(3A). The evidence had the potential to remove any reasonable doubt about whether the respondent's semen was deposited on the occasion alleged by the Crown.

Orders Made

  • Appeal allowed.
  • The ruling of Judge Lerve made on 30 January 2014 excluding the evidence of the forensic biologist regarding the detection of spermatozoa in the smears and her opinion as to the possible period between ejaculation and the creation of the smears was vacated.

Key Takeaways

  • The Court of Criminal Appeal confirmed that when a trial judge evaluates the relevance of evidence on a voir dire, the assessment must proceed on the basis of the evidence taken at its highest and on the assumption that the jury will act upon it.
  • Under s 55 of the Evidence Act 1995 (NSW), evidence is relevant if it could rationally affect the assessment of the probability of a fact in issue. Expert evidence about the survival time of intact spermatozoa satisfied that test where the timing of intercourse was directly disputed.
  • A Crown appeal under s 5F(3A) of the Criminal Appeal Act 1912 (NSW) requires the impugned ruling to have eliminated or substantially weakened the prosecution's case. The Court found that threshold met where the excluded evidence could have negated the respondent's alternative account of when intercourse occurred.
  • Circumstantial reasoning can establish the source of biological material even where the specific item in question was not directly DNA-analysed, provided no rational alternative hypothesis is available on the evidence.
  • In dismissing the relevance objection, the Court noted that the connection between the smear slides and the DNA-positive swabs was sufficiently established by the manner in which the smears were prepared, removing any proper basis for treating the sperm as being of unknown origin.

Legislation and Cases Referenced

Legislation:
- Criminal Appeal Act 1912 (NSW), s 5F(3A)
- Evidence Act 1995 (NSW), ss 55, 79, 137

Cases:
- R v ELD [2004] NSWCCA 219