R v Marshall

R. v. Marshall

[1995] O.J. No. 4476
Ontario Court of Justice (Provincial Division) — Weagant Prov. J. | December 22, 1995

Background

Kyle Marshall was charged with speeding under the Highway Traffic Act, allegedly driving 99 kilometres per hour. The Crown's case relied entirely on a speed reading from a laser speed detection device — a relatively new technology at the time. The officer who operated the laser testified that she was qualified to use it and had performed various tests to ensure it was working properly. One of those tests involved checking the laser's accuracy against a traditional radar machine.

However, the Crown failed to establish that the officer was qualified to operate the radar machine she used to test the laser device. This seemingly minor oversight would prove fatal to their case.

Issues

1. Whether the Crown proved beyond a reasonable doubt that Marshall was driving 99 km/h
2. Whether proper foundation was laid for the laser speed detection evidence

The Chain of Evidence Problem

Judge Weagant identified a critical flaw in the Crown's evidence. While the officer was qualified to operate the laser device, she tested it against a radar machine — and the Crown provided no evidence that she was qualified to operate that radar machine. The judge noted that "perhaps only because of the state of the jurisprudence at this point, the Crown did not see fit to ask the questions" that would have established the officer's radar qualifications.

This created a logical problem: if testing against the radar was "the all-important test" for determining that the laser was capable of measuring vehicle speed, then the Crown needed to prove the radar was working properly and that the officer could operate it correctly. Without that foundation, the entire chain of evidence collapsed. The judge emphasized that proper evidence would need to be called to establish "beyond a reasonable doubt that the radar was in working order and that the police officer using it for test purposes is qualified to so do."

The judge also noted that while the officer's visual observations could have supported a speeding conviction, no speed estimate was provided — the guilty verdict had been based entirely on the laser readings.

Key Takeaway

Even sophisticated technology is only as reliable as the foundation evidence supporting it.

This case demonstrates that the Crown must establish a complete chain of evidence for speed detection devices. When challenging radar or laser evidence, defendants should examine whether proper foundation was laid for all equipment used, including any devices used to test or calibrate the primary speed detection equipment.