James G. Wigmore

Jim Wigmore has testified in more than 700 criminal cases across Canada, along with numerous civil proceedings and coroner’s inquests. His expertise covers the full spectrum of toxic substances that forensic scientists encounter:

• Alcohol Analysis: Developed court-accepted methodologies for blood alcohol concentration (BAC) calculations and impairment assessment
• THC/Cannabis: Published definitive research on detection windows and impairment markers
• Nicotine: Advanced understanding of poisoning cases and drug delivery systems
• Carbon Monoxide: Authored comprehensive guides on this silent killer

Scientists worldwide reference Jim’s 70+ peer-reviewed articles in forensic toxicology, including works cited by the Supreme Court of Canada. His media commentary on CBC and other outlets following cannabis legalization has helped shape public understanding of forensic science principles.

The Canadian Society of Forensic Sciences honored this exceptional forensic scientist with their prestigious Derome Award, recognizing his outstanding contributions. Jim’s service on Health Canada’s expert panel for cannabis information further demonstrates his status as a leading forensic scientist.

Beyond alcohol and THC – the substances forensic scientists most commonly analyze – Jim has made significant contributions to nicotine research. His work helps forensic scientists understand:

• Nicotine poisoning mechanisms
• Modern drug delivery systems (vaping, patches, etc.)
• Toxicology interpretation in accidental and intentional cases

For forensic scientists entering the field, Jim’s career offers a model of excellence:

• Nearly three decades at Canada’s top forensic lab
• Courtroom-tested methodologies
• Research that bridges academia and practical casework
• Clear communication of complex toxicology concepts

Forensic scientists rely on Jim’s books and publications because they combine rigorous science with real-world applicability. His works on alcohol, THC, nicotine, and carbon monoxide provide:

• Laboratory-validated analysis techniques
• Courtroom presentation strategies
• Historical context for substance trends
• Emerging challenge areas (e.g., vaping-related cases)

Today, forensic scientists across North America continue to apply Jim Wigmore’s methodologies in their casework. His legacy as a forensic scientist includes not just hundreds of resolved cases, but also the education of future generations through his publications, media appearances, and professional guidance.