Citation: R v HAOUI [2007] NSWDC 62
Court: District Court of New South Wales
Date: 20 April 2007
Judge(s): Berman SC DCJ
Background
The accused faced trial on a charge of driving at a speed dangerous to another person, where the impact of his vehicle caused grievous bodily harm to another road user in Frederick Street. He pleaded not guilty. The Crown's entire case on vehicle speed rested on the evidence of a single police officer, Sergeant John Kelly, who had not attended the collision scene at the time of the incident but later used data collected by other officers to calculate the accused's speed.
Sergeant Kelly applied established equations of motion to that data, concluding that the accused had been travelling at approximately 91 kilometres per hour at the start of his skid marks. Before the jury heard this evidence, a voir dire (a preliminary hearing to determine admissibility) was conducted at the request of the defence.
The accused's legal team raised several objections to Sergeant Kelly's evidence. The prosecution's handling of disclosure had been poor: the first expert report was seriously deficient, and subsequent remedial reports were served very late, with the final report provided only shortly before Sergeant Kelly was called to give evidence at trial.
Legal Issues
- Whether Sergeant Kelly's opinion evidence on vehicle speed was admissible at all, given the deficiencies in his initial report and the late service of subsequent reports
- Whether the evidence should be excluded under section 137 of the Evidence Act on the basis that the danger of unfair prejudice to the accused outweighed its probative value
- Whether Sergeant Kelly had sufficient expertise to give the opinion evidence he proposed to give
- Whether section 136 of the Evidence Act could be used to limit the scope of the evidence he was permitted to give
Decision
The court ruled that Sergeant Kelly's evidence was admissible. While the first report was acknowledged to be seriously deficient, the combined effect of the subsequent reports and his oral evidence on the voir dire was sufficient to establish a proper basis for his conclusions. He had explained why he selected particular values, demonstrated the general acceptance of the equations he used, and confirmed that in every instance where a margin of error existed, he had chosen a conservative figure that favoured the accused.
On the section 137 objection, the court accepted that the late service of reports had created forensic difficulties for the defence, but was not persuaded those difficulties translated into unfair prejudice that outweighed the probative value of the evidence. The court reasoned that any legitimate prejudice could have been addressed through adjournments, the opportunity to brief a defence expert, and a direction to the jury that all delays were the prosecution's responsibility. The court noted it had in any case told the jury that prolonged absences from the courtroom were caused by the Crown's late service of material.
The court was satisfied that Sergeant Kelly possessed the requisite specialised knowledge and experience to give the opinion evidence. The absence of a suggestion that he was using untested science, or applying equations in novel circumstances, was relevant. The court noted that the fact another person might have greater expertise, or might choose different values, did not render his evidence inadmissible.
On the section 136 argument, the court found that provision is directed to restricting how admitted evidence may be used by the jury, not to preventing evidence from being admitted in the first place. It was therefore not applicable in the way the defence proposed.
Orders Made
No orders were made in this decision.
Key Takeaways
- A seriously deficient initial expert report does not of itself render the expert's evidence inadmissible, provided subsequent reports and oral evidence given on a voir dire sufficiently establish the basis for the conclusions reached.
- Under section 137 of the Evidence Act, late service of expert material by the prosecution may create forensic difficulties for the defence, but those difficulties will not automatically constitute unfair prejudice that outweighs probative value, particularly where adjournments, expert access, and jury directions can address the harm.
- Sufficient expertise to give admissible opinion evidence does not require that the witness be the most qualified person available, nor that no other expert could disagree; the relevant question is whether the witness has the specialised knowledge or training required to provide an opinion on which the jury can act.
- Section 136 of the Evidence Act operates to limit the use the jury may make of admitted evidence; it does not operate as a mechanism to prevent admission of evidence in the first place.
- The District Court confirmed that using conservative values throughout a speed calculation, where each margin of error is resolved in the accused's favour, supports rather than undermines the admissibility and reliability of the resulting opinion.
Legislation and Cases Referenced
Legislation
- Evidence Act (NSW), section 136 (limiting use of evidence)
- Evidence Act (NSW), section 137 (exclusion of evidence where probative value is outweighed by danger of unfair prejudice)
Cases cited
No cases were cited in the portions of the judgment provided.