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This is a sample cross-examination of an Ontario CFS scientist on the procedure used to perform an initial factory calibration (or a...

This is a sample excerpt from a cross-examination of a Crown expert using data from periodic inspection of an approved instrument. The...

Purpose: To remind the Court, "thing 1" in 258(1)(c) is unconstitutional under Charter 11(d) (R v St-Onge) but is saved by section 1. To...

In an article relied upon by the SCC in St. Onge, Brian Hodgson stated: Defence lawyers need to educate themselves about the meanings of...

Purpose: To educate the Court about the Analytical Theory of the 8000C Optical Bench including Emitter, Sample Chamber, Dual Detectors,...

Lawyers and Judges need to get past their deep-seated fear of uncertainty. If we are to promote the use of good science, in Court, we, as...

Purpose: To challenge the CFS expert's position that inconvenient data should be excluded for the purpose of calculating precision. To...

Purpose: To obtain an acknowledgement from a CFS scientist that even though he would exclude data outside (the Maximum Permissible Error...

Purposes of this cross-examination: To challenge the opinion that data outside maximum permissible error (outside +/- 10 mg%) should be...

Purpose: To establish a better methodology for calculating precision of an approved instrument in service. To apply CFS methodology using...

Purpose: To elicit evidence to the Court as to the inadequacy of calculation of the instrument's precision by the local police service,...

Purpose: To obtain admissions about the use of historical control test data by the Centre of Forensic Sciences in Toronto to calculate...

Purpose: To explore the lack of a lab setting when accuracy and precision of the instrument are checked on periodic or annual inspection....

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 support argument that the Maintenance History shows that the instrument was taken "out of service", for "consistently low...

Purpose: To suggest that ATC/CFS scientists cannot provide any scientific opinion of the reliability of aging instruments out in the...

Purpose: To neutralize the government scientist's assertion that anomalous data should be excluded from calculation of precision. To...

Purpose: To establish that the ATC/CFS is not sampling from aging instruments out in the field to determine error rates To establish that...