R. v. Nuttall
The reasonable suspicion standard has been described as not “unduly
Page 191
onerous” (R. v. Mack, at 554) and “necessarily …low”: R. v. Cahill (1992), 13
C.R. (4th) 327 (B.C.C.A.) at 339. It is an intermediate standard: R v. A.M.
(2008), 230 C.C.C. (3d) 377 (S.C.C.) at para. 60, 82. Because reasonable
suspicion “is a less demanding standard than reasonable grounds” (R. v.
Bennett (1996), 108 C.C.C. (3d) 175 (Que. C.A.) at 183), it has been correctly
observed “that a reasonable suspicion will much more frequently be wrong
than will be reasonable and probable grounds”: T. Quigley, “Brief
Investigative Detentions: A Critique of R. v. Simpson” (2004) 41 Alta. L. Rev.
935, at para. 20. Put differently, the reasonable grounds to suspect standard
is a minimal level of belief which does not rule out the possibility of innocent
conduct or “other reasonable possibilities”: United States v. Gould, 364 F. 3d
578, 593 (5th Cir. 2004).
[561] In R. v. Chehil, 2013 SCC 49, the accused claimed his rights under s. 8 of the
Charter were violated when the police deployed a sniffer dog in the baggage
destined for a flight. His argument was based on the lack of reasonable suspicion.
Karakatsanis J. opined that the requirement for objective facts in support of
reasonable suspicion permits rigorous scrutiny by the court (at paras. 45-46):
[45]
The requirement for objective and ascertainable facts as the basis for
reasonable suspicion permits an independent after-the-fact review by the
court and protects against arbitrary state action. …
[46]
Rigorous judicial scrutiny is an independent review that ensures that
the suspicion relied on by the police is supported by factors that are
objectively ascertainable, meaning that the suspicion is based on “factual
elements which can be adduced in evidence and permit an independent
judicial assessment”: P. Sankoff and S. Perrault, “Suspicious
Searches: What’s so Reasonable About Them?” (1999), 24 C.R. (5th) 123,
at p. 125. The constellation of facts must be based in the evidence, tied to
the individual, and capable of supporting a logical inference of criminal
behaviour. If the link between the constellation and criminality cannot be
established by way of a logical inference, the Crown must lead evidence to
connect the circumstances to criminality. This evidence may be empirical or
statistical, or it may be based upon the investigating officer’s training and
experience.
[562] At para. 47, she addressed the impact of an officer’s training and experience
on the court’s evaluation of reasonable suspicion:
An officer’s training and experience may provide an objective experiential, as
opposed to empirical, basis for grounding reasonable suspicion. However,
this is not to say that hunches or intuition grounded in an officer’s experience
will suffice, or that deference is owed to a police officer’s view of the
circumstances based on her training or experience in the field: see Payette,
at para. 25. A police officer’s educated guess must not supplant the rigorous