Demeanour Evidence
Sometimes courts will receive demeanour evidence, that is to say, evidence
of how a person appeared or acted after or during an event. In its normal,
natural everyday sense, the term “demeanour” refers to conduct, behaviour, a
way of acting or to a person’s bearing, mien or outward manner.
Implicit in the reception of evidence of a
person’s demeanour, however, are two invalid assumptions. The first assumes
that for every action or event there is a normal reaction or manner of
reaction. And the second is that an individual’s reaction actually reflects his
or her inner emotional reaction or state:
R. v. Wall (2007), 2005
CanLII 80695 (ON CA), 2005 CanLII, 203 C.C.C. (3d) 232 (Ont. C.A.), at
para. 49.
As a result of the invalid assumptions that
underpin demeanour evidence, this evidence requires a predominance of probative
value over prejudicial effect to be admissible:
Wall, at para. 50; see
also R. v. Pannu, 2015 ONCA 677.
The evidence must be sufficiently clear to render
its admission of value. As Doherty J.A. said in R. v. Trotta, 2004 CanLII 34722 (ON CA), [2004] O.J. No. 4366, 190
C.C.C. (3d) 199 (C.A.), at para. 41:
The circumstances surrounding
the proffered evidence must be such as to make that evidence sufficiently
unambiguous and demonstrative of a relevant state of mind so as to overcome
concerns that a trier of fact may too easily equate what is perceived to be an
"unusual" reaction with a guilty mind.
Notwithstanding
the above, the Court of Appeal has, more recently, taken the following
position:
Despite
academic and judicial commentary suggesting demeanour evidence is unreliable,
under Canadian jurisprudence it remains relevant to the assessment of a
witness’s credibility: see, for example, R.
v. N.S., 2012 SCC 72 (CanLII), [2012] 3 S.C.R. 726; and O.M.,
2014 ONCA 503 (CanLII), at para. 34. As long as a trial judge does not unduly
rely on demeanour to make a credibility finding, the trial judge will not fall
into error.
R. v. R.D., 2016 ONCA 574 (CanLII), at para. 25.
Stuart O’Connell.
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