La mens rea de l'infraction de port d’arme dans un dessein dangereux doit être formée avant la prise de possession de l’arme et certainement avant son utilisation. L'ensemble des circonstances est hautement pertinente à l’analyse de son intention quant à la possession

R. v. Budhoo, 2015 ONCA 912

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[72]      The appellant was convicted of weapons dangerous in relation to the knife used in the stabbing. The use of a dangerous weapon for a dangerous purpose is not enough for a finding of guilt. The jury must find that the appellant possessed the knife for a purpose dangerous to the public peace.

[73]      That purpose must be determined at the instant of time which preceded the use of the weapon. The use of a knife in a manner dangerous to the public peace does not constitute the offence, although the formation of the unlawful purpose may be inferred from the circumstances in which the knife was used: see R. v. Proverbs (1983), 1983 CanLII 3547 (ON CA), 9 C.C.C. (3d) 249 (Ont. C.A.), at 251.