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Tip 47: A calibration check using a wet-bath simulator containing alcohol standard is not reliable if information is missing about air...

Experiment studying the phenomenon of disappearing alcohol It is easy to replicate this experiment on an Intoxilyzer® 5000. It is more...

Tip 45: Study the breath room video and learn everything you can about the breath room and detachment. Watch for: Has the qualified...

Tip 43: A properly functioning approved instrument air blank system (including the instrument itself, the ambient environment around the...

Tip 39: The key to usefulness of alphanumeric seals on a #duisimulator is whether or not the incoming seal number on the subsequent...

Warning: This blog entry was written prior to Bill C-46 during an era when forensic science in Ontario was more transparent. Prior to R....

The video below displays a variety of alcohol standards that could be used in a #duisimulator for evidentiary breath testing for...

Tip 34: The use of an alcohol standard during evidentiary breath testing in Canada was not mentioned in the Criminal Code as a condition...

There are three conditions precedent to the Crown's use of the "conclusive proof" presumption in secton 320.31(1) of the Criminal Code of...

The cross-examination example below, is of a very, very, experienced and respected qualified technician. Notwithstanding his training and...

Tip 50: When an "approved instrument" is calibrated at the factory, the manufacturer doesn't simply adjust the electronics in the...

A wet-bath simulator is "accessory equipment" according to the ATC Best Practices document. A wet-bath simulator requires annual...

Purpose: To connect the concept of measurement standard, reference standard, étalon to Canadian law, Canadian constitutional law, and...

What is the purpose in Stinchcombe/McNeil disclosure or O'Connor production of maintenance records and historical data? Crown CFS...

Purpose: To cross-examine a CFS scientist on use of Guth 2100 wet-bath simulator under Canadian cold operating conditions To build a case...

Purpose: To remind the Court of the concept of "reliability" used by the SCC in St-Onge. To educate the Court as to the definitions of...

Purpose: To obtain admissions respecting the inadequacy of ATC / CFS recommendations in requiring "stability of metrological...

Sample Cross-examination of CFS expert on OIML standard R126 (2012) respecting maximum permissible error in evidentiary breath...

Purpose: To show that the ATC recommendations for operational procedures at time of use do not account for the need during inspections to...

Purpose: To suggest that an AI is a quantitative analysis instrument and an ASD is a qualitative analysis instrument and suggest that the...