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It is very easy for a qualified technician to accidentally flood the sample chamber on an Intoxilyzer 5000 (or 5000C) or an 8000 (or...

The Intoxilyzer® 8000 depicted in this video was once a reliable evidentiary breath testing instrument in the United States. It is...

Many years ago I asked for timely disclosure/production of a representative bottle of the alcohol standard lot used during the breath...

Many years ago Ontario defence lawyers cross-examined breath techs on "how much room there was" on the particular Intoxilyzer 5000C to...

Tip 41: Changing breath room ambient conditions can reduce "system calibration check" and "system blank test" reliability. Any...

If you served wine or beer at a pub in ancient Egypt the beverages were measured out using liquid volume instruments like these. Each...

Tip 25: Obtain a copy of the Guth Laboratories, Inc. wet-bath "Model 2100 Simulator Operation Manual" and study the "Model 2100-Block...

Tip 27: Does the Inspector use a traceable reference thermometer, that is accurate and precise, to at least two decimal places, to...

Tip 40: Some police services take the position that they don't need to use seals between the simulator housing and the jar. Failure to...

Tip 35: The simplest method of communicating the last change date of the alcohol standard solution placed into the wet-bath simulator is...

Does partial automation of error-checking in an approved instrument: specifically diagnostics tests, air blanks, cal. checks, and maximum...

Tip 37: Defence lawyers need to study the video - does the qualified technician take a random (unrelated to the matter before the Court)...

Tip 14: Whenever police purchase a new NIST mercury thermometer, the Canadian distributor provides them with a "Guth Laboratories, Inc....

Tip 38: One of the best ways to control wet-bath simulator alcohol standard continuity is to use alphanumeric police seals and record...

Tip 36: Some police detachments have been known to write the manufacturer name, lot number, name/badge of solution change officer,...

Tip 30: The CFS 8000C Training Aid of 2013 at page 191 of 238, Appendix "E" recommends that the Alcohol Standard Log, updated by 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....

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...