John James O'Connor v Susan Bradshaw and the County Court of Victoria

In the County Court of Victoria, John James O'Connor was prosecuted by Susan Bradshaw for driving a motor vehicle while the amount of alcohol in his breath exceeded the legal limit. The case hinged on the evidence provided by a breathalyser certificate, which indicated that O'Connor's breath alcohol concentration was above the legal limit of 0.05%. The primary legal issue before the court was whether the breathalyser certificate constituted conclusive evidence of the defendant's guilt, and if not, the extent to which the certificate could be relied upon when the defendant had given a notice as required by statute.

The court considered the provisions of the Road Safety Act 1986, specifically sections 49(1)(f), 58(2), and 58(2D), which outline the procedures for the admissibility and effect of breathalyser certificates. The court found that while the certificate is generally conclusive evidence of the results unless a notice is given, once a notice is provided, the certificate remains evidence of its contents, but not of the underlying facts it purports to establish. The court also referred to previous cases such as Furze v Nixon and Impagnatiello v Campbell to reinforce the principle that where there is no evidence, the finder of fact is entitled to prefer some evidence over other evidence. The court concluded that there was no error of law in the trial judge's approach and upheld the conviction against O'Connor.

The final orders of the court affirmed the conviction against John James O'Connor for driving with a breath alcohol concentration exceeding the legal limit. The court held that the trial judge was entitled to prefer the evidence of the breathalyser certificate over any other evidence presented, given that the defendant had not successfully challenged the certificate's contents. The conviction was thus upheld, and O'Connor's appeal was dismissed.