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COVID-19 Pandemic Planning for the Scheduling of Matters in the Ontario Court of Justice



If you are scheduled to be in an Ontario Criminal Court that is the Superior Court of Justice:




Advisory Notice to Lawyers, Litigants, Witnesses, Jurors, Media, and Members of the Public Regarding COVID-19

During this crisis we are all trying to keep our families safe. I am happy to talk to you by phone at 905-273-3322 for a few minutes of free emergency legal advice. On Mondays and Tuesdays I am scheduling 1 hour  $200 Skype or FaceTime consultations. Please e-mail Stephen Biss at if you would like to book a virtual appointment to discuss a DUI matter.

Discussion of Approved Instruments, Approved Screening Devices, Approved Drug Screening Equipment, Alcohol Standards, and Wet-bath Simulators used by Police in Canada.

Purpose - to assist defence lawyers in examining the "reliability" of aging breath instruments

This site promotes discussion among defence lawyers in Canada. It deals with transparency in the quality assurance and quality control measures used by police respecting evidentiary breath testing equipment. As instruments age, they require maintenance to ensure that all of their systems function in accordance with the manufacturer's specifications. Modern approved instruments measure time, mouth alcohol, breath volume, breath flow, radio frequency interference, ambient conditions, chemical interferents, and other values, and match them against internal and external standards. As time passes, systems and sensors get dirty or unstable, clock batteries weaken, and calibration drifts.

In R. v. St-Onge Lamoureux, the Supreme Court of Canada relied on a paper by Brian Hodgson, entitled The Validity of Evidential Breath Testing. Hodgson stated in that review article:

"Any scientific device or technique used to measure breath alcohol concentrations must address four fundamental issues in its design: accuracy, precision, reliability and specificity."

Hodgson defines "reliability" as follows:

"Reliability refers to the ability of the instrument to perform over time without any significant drift in accuracy and precision."


The 5000EN instrument depicted on this page was once a reliable evidentiary breath instrument. However, it has not been properly maintained. Calibration of the internal standards has drifted over time. As with an aging automobile that has not been properly maintained, this instrument has become unreliable. The accuracy and precision of either its breath analysis system or its internal standards have drifted. It requires multiple start attempts to get it going. Over time, sometimes it passes and sometimes it fails its startup tests. Sometimes it starts after 2 tries, sometimes after 20, sometimes hours later, and sometimes not at all. Once it is going, however, it passes (at time of use) stand-alone diagnostics, stand-alone cal. checks, stand-alone breath tests, and internal standards.


However, the purpose of a breathalyzer is different from an automobile. A breathalyzer is a scientific and forensic measuring device. It does not simply "work" or "not work". We rely on a breathalyzer to measure guilt or innocence. Measurement of BAC for forensic purposes is a quantitative analysis. An "approved instrument" measures quantities, not simply pass or fail. That quantitative analysis must be reliable across the measurement range of the instrument.

Unlike an automobile, the purpose of an evidentiary breath testing instrument is not to simply get from one point to another, i.e. produce a result. A breathalyzer's purpose is to accurately, precisely, specifically, and reliably measure a whole variety of parameters associated with the prosecution of an excess blood alcohol criminal charge or a refusing / failing to provide an adequate breath sample criminal charge. The instrument does not simply work or not work. It measures for a forensic science purpose. Calibration of all measuring systems or exception thresholds (e.g. RFI, interferent, and ambient environmental conditions) must be in accordance with the manufacturer's specifications. A simple calibration check of ethyl alcohol calibration at 100 mg/100mls ONLY does not provide a complete control check for ethyl alcohol at other concentrations because calibration is a curve; it is not linear. A simple wet-bath or dry gas calibration check DOES NOT constitute a control check for all the other measuring systems or exception thresholds. That's why regular complete inspections and maintenance of breath instruments are so essential to the integrity of  breath testing in Canada. Transparency of documentation of such inspections and maintenance is essential to the constitutionality of the Parliamentary scheme - see R. v. St-Onge Lamoureux in the SCC.


The "approved instrument", the breathalyzer itself,  is not the only measuring device used in evidentiary breath testing in Canada. Accessory equipment is necessary too, and must be inspected and maintained to check calibration and thresholds for exception messages. Accessory equipment includes simulators and simulator thermometers. Transparency of documentation of such inspections and maintenance is also essential to the constitutionality of the legislative scheme (see R. c. Lopez in QC SC).

The failure of investigating authorities to recognize the forensic purpose behind quantitative analyses used in Court proceedings  has resulted in miscarriages of justice in Ontario. The Motherisk Inquiry  is a good example of a review of what can go wrong when authorities fail to recognize that most forensic analyses are quantitative rather than qualitative and fail to follow clear standard operating procedures. CFS scientists have acknowledged during cross-examination that Criminal Code sections 253(1)(b), 254 "approved instrument", 254(3)(a)(i), 258(1)(c), and 255.1 require quantitative analysis to determine concentration, rather than the qualitative analysis of a screening device. CFS scientists have also acknowledged that neither the Alcohol Test Committee nor the Centre of Forensic Science provide metrological supervision of police. It is respectfully submitted that if Ontario's approved instruments are not properly and transparently maintained and operated, under proper metrological supervision, so that they are capable of providing scientifically reliable quantitative analysis, then Parliament's breath testing schemes under both Bill C-2 and Bill C-46 are frustrated.  Parliament cannot have intended such an unreasonable and unconstitutional application of its scheme.


Access to the Blog is Restricted to Members of this Site

The Members Only Blog section of this website  contains a large number of resources for use by Canadian defence lawyers in defending charges of impaired driving, over 80, and refusal to blow. Under Bill C-46 we will be paying a great deal of attention to the ambient fail systems and the control check systems of approved instruments. It is important that lawyers prepare for cross-examination of Qualified Technicians and government experts. We have created three online courses to help defence lawyers. Before a defence lawyer is approved for members only participation in this blog, he or she must complete the three online courses.

Please find below, a simple explanation of the creation of the Intoxilyzer 8000C calibration curve at the factory or during re-calibration by the Canadian Authorized Service Centre. This video is an excerpt from one of our online courses for defence lawyers.

© 2019 Allbiss Lawdata Ltd. All rights reserved. This is not a government web site.



For more information respecting this database or to report misuse contact: Allbiss Lawdata Ltd., 303-470 Hensall Circle, Mississauga, Ontario, Canada, L5A 3V4, 905-273-3322. The author and the participants make no representation or warranty  whatsoever as to the authenticity and reliability of the information contained herein.  WARNING: All information contained herein is provided  for the purpose of discussion and peer review only and should not be construed as formal legal advice. The authors disclaim any and all liability resulting from reliance upon such information. You are strongly encouraged to seek professional legal advice before relying upon any of the information contained herein. Legal advice should be sought directly from a properly retained lawyer or attorney. 

WARNING: Please do not attempt to use any text, image, or video that you see on this site in Court. These comments, images, and videos are NOT EVIDENCE. The Courts will need to hear evidence from a properly qualified expert. The author is not a scientist. The author is not an expert. These pages exist to promote discussion among defence lawyers.


Intoxilyzer®  is a registered trademark of CMI, Inc. The Intoxilyzer® 5000C is an "approved instrument" in Canada.
Breathalyzer® is a registered trademark of Draeger Safety, Inc., Breathalyzer Division. The owner of the trademark is Robert F. Borkenstein and Draeger Safety, Inc. has leased the exclusive rights of use from him. The Breathalyzer® 900 and Breathalyzer® 900A were "approved instruments" in Canada.
DrugTest® 5000 is also a registered trademark of Draeger Safety, Inc.. DrugTest® 5000 is "approved drug screening equipment" in Canada.
Alcotest® is a registered trademark of Draeger Safety, Inc. The Alcotest® 7410 GLC and 6810 are each an "approved screening device" in Canada.
Datamaster®  is a registered trademark of National Patent Analytical Systems, Inc.  The BAC Datamaster® C  is an "approved instrument" in Canada.