Abbey Road: The (Ongoing) Journey to Reliable Expert Evidence

Jason M Chin, “Abbey Road: The (Ongoing) Journey to Reliable Expert Evidence” (2018) 96:3 Canadian Bar Review 422-459.

46 Pages Posted: 9 Jan 2019 Last revised: 2 Jan 2021

Date Written: December 28, 2018


Canadian courts draw a tenuous distinction between expert scientific evidence and what they characterize as specialized knowledge gained through the expert witness’s experience, training, and research. This characterization is based on unclear criteria and has significant consequences. Notably, specialized knowledge regularly receives considerably less scrutiny than that which is characterized as science, while still often serving as powerful inculpatory evidence in criminal trials. Moreover, specialized knowledge is often provided by figures that carry an air of authority, like police officers and scientists. This article focuses on the leading opinion on specialized knowledge, the Court of Appeal for Ontario’s decision in R v Abbey. An analysis of Abbey’s application to three fields of contested specialized knowledge (including the evidence the Abbey Court admitted, but fresh evidence revealed as fundamentally unreliable) provides two general insights. First, while Abbey could be interpreted as providing for a flexible and probing analysis of all expert evidence, courts have often relied on it to justify giving almost no scrutiny to specialized knowledge. Second, this review of the post-Abbey jurisprudence suggests that scrutiny focused on the transparency of the expert’s data and analysis, and whether that analysis can reliably be applied to the relevant factual question, may provide a valuable way to evaluate expertise.

Keywords: Expert Evidence, Evidence, Evidence Law, Canadian Evidence Law, Criminal Law, Canadian Criminal Law, R v Abbey, Sociology, Scientific Evidence, Specialized Knowledge

JEL Classification: k14

Suggested Citation

Chin, Jason, Abbey Road: The (Ongoing) Journey to Reliable Expert Evidence (December 28, 2018). Jason M Chin, “Abbey Road: The (Ongoing) Journey to Reliable Expert Evidence” (2018) 96:3 Canadian Bar Review 422-459., Available at SSRN:

Jason Chin (Contact Author)

Sydney Law School ( email )

New Law Building, F10
The University of Sydney
Sydney, NSW 2006

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