Police v Miller

The case of Police v Miller involved the defendant being charged with speeding offences. The trial was held in the Magistrates' Court of South Australia, and the decision was subsequently appealed to a higher court. The key legal issue in the case revolved around the validity of the evidence provided by a Traffic Speed Analyser (TSA) used by the police to measure the speed of the defendant's vehicle. Specifically, the court had to determine whether the TSA was properly calibrated and tested to ensure its accuracy at the time of the incident.

The court examined the process followed by Inspector Peter Kennedy, who signed the certificate for the TSA, and the documents provided to him, including the calibration report and field test results. The court found that Inspector Kennedy did not read the entire calibration report but only noted the date and that it was within the required 12-month period. The court concluded that there was insufficient evidence to show that the TSA was accurate to the extent specified in the certificate. This meant that the presumption under the Road Traffic Act 1974 (SA) s 175(3)(ba) could not be applied.

Given the lack of proper evidence regarding the accuracy of the TSA, the court found that the prosecution had not proven the charges beyond reasonable doubt. Consequently, the appeal was upheld, and the conviction was set aside. The court also noted that the prosecution had made tactical decisions, such as not calling Inspector Kennedy as a witness, which further undermined the reliability of the evidence presented. Ultimately, the court dismissed the complaint and did not order a retrial, considering the circumstances and the lack of proper evidence.