Purpose of disclosure or production of maintenance records and data

What is the purpose in Stinchcombe/McNeil disclosure or O'Connor production of maintenance records and historical data? Government scientists are right in saying that there is no causal relationship between the historical data and the results of a subsequent subject test. ​ Factors like dirt in the sample chamber or degradation in the electronic signal coming out of the detector at the end of the sample chamber, over time, may cause error. Inadequate factory calibration may cause error. Negligent re-calibration across the measuring interval of the instrument may cause error. Operator error may cause error. Physiological presentations not contemplated by the design of the instrument can cause

Toxicology Letter of Opinion Without Accreditation

Purpose: To establish that the Crown expert letter of opinion is based upon an analysis done by an entity other than the expert or his/her lab To establish that such a practice is not authorized by the accreditation given to his/her lab To establish that the expert's lab accreditation includes toxicology but not breath testing To establish that letters of opinion respecting evidentiary breath testing from the expert's lab no longer carry an accreditation seal To establish that police services in the United States, including Los Angeles, Dallas, Orange County, Ventura County, and Richmond have accreditation related to evidentiary breath testing #accreditation

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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.