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    Reliability of Approved Instruments in Field Over Time is a Hypothesis: Where is Empirical Study?
    Stephen Biss
    • Aug 2
    • 9 min

    Reliability of Approved Instruments in Field Over Time is a Hypothesis: Where is Empirical Study?

    Purposes: To obtain the following admissions from the Crown's expert: Calibration of an approved instrument out in the field does not...
    0 views0 comments
    Establishment of Calibration Intervals
    Stephen Biss
    • Mar 25, 2018
    • 2 min

    Establishment of Calibration Intervals

    The concept of "calibration interval" is an important one in measurement science. Unfortunately most criminal law lawyers and Judges are...
    2 views0 comments
    Internal Standards Also Need Calibration and Calibration Interval
    Stephen Biss
    • Mar 24, 2018
    • 5 min

    Internal Standards Also Need Calibration and Calibration Interval

    Purpose: To explain the function of internal standards, the ITP, internal test procedure to the Court. To obtain an admission that the...
    3 views0 comments
    Federal Government Policy and Mandatory Calibration Intervals
    Stephen Biss
    • Jan 14, 2018
    • 2 min

    Federal Government Policy and Mandatory Calibration Intervals

    Purpose: To obtain an admission that the ATC Position Paper of 2012 contradicts the federal government policy in the Fairness at the...
    7 views0 comments
    Control Tests do not displace Formal Calibration Intervals
    Stephen Biss
    • Jan 13, 2018
    • 7 min

    Control Tests do not displace Formal Calibration Intervals

    Purpose: To separate conceptually control tests from calibration To obtain an admission that there are no "assessors" in the province of...
    1 view0 comments
    R. v. Vallentgoed Distinguished on facts - Short Calibration Interval
    Stephen Biss
    • Jan 13, 2018
    • 17 min

    R. v. Vallentgoed Distinguished on facts - Short Calibration Interval

    Purpose: To obtain admissions from the Crown expert to enable argument that Vallentgoed can be distinguished on its facts - particularly...
    1 view0 comments
    Short Calibration Interval and Reliability
    Stephen Biss
    • Jan 12, 2018
    • 4 min

    Short Calibration Interval and Reliability

    Why is disclosure of information about the "calibration" of the approved instrument essential to any assessment of the reliability of a...
    4 views0 comments

    If you are a member of the public, please don't attempt to use what you see or read at this site in Court. It is not evidence. The author is not a scientist. The author has a great deal of experience in cross-examining scientists about these issues, but the author is not a scientist. Hire a criminal lawyer in private practice in Ontario. Your lawyer can retain an expert.

    © 2022 Allbiss Lawdata Ltd.

    This site has been built by 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., Mississauga, Ontario, Canada, 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.

    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.