R v Mateus

R. v. Mateus

[2008] O.J. No. 5590
Ontario Court of Justice — D. Robinson J.P. | September 8, 2008

Background

Marco Mateus was charged under section 128 of the Highway Traffic Act for speeding. The officer was stationed on Weston Road specifically to monitor the speed of moving motor vehicles using radar equipment. During the trial, the officer testified that he had tested the equipment and found it to be in proper working order before using it to clock Mateus's speed.

However, the defence challenged the reliability of the radar evidence by arguing that the officer's testing procedures were flawed. The case turned entirely on whether the officer had properly tested the radar equipment according to the manufacturer's specifications.

Issues

1. Were the officer's testing procedures for the radar equipment adequate to establish its reliability?
2. Can the court rely on radar evidence when the testing procedures don't fully comply with manufacturer specifications?

The Equipment Testing Defect

Justice Robinson found that despite the officer's testimony about testing the equipment, there were "inconsistencies and the seemingly non-full compliance with the tests outlined by the manufacturer." The court emphasized that unless radar testing procedures are "consistent and compliant with that of the tests set out by the manufacturer," the evidence is flawed and unreliable.

The judge applied established case law holding that when test procedures are flawed, "one cannot rely on the reading of the machine." This wasn't about whether the radar gun actually worked — it was about whether the Crown could prove it worked through proper testing protocols. The court noted there was a "compelling argument" that the testing failures created reasonable doubt about the equipment's reliability.

Key Takeaway

Radar evidence is only as good as the testing procedures used to verify the equipment's accuracy.

Self-represented defendants should scrutinize whether the officer followed the manufacturer's specific testing protocols exactly. Even if the equipment appeared to work properly, deviations from required testing procedures can create reasonable doubt and lead to dismissal of speeding charges.