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Criminal law 2023 SCC 24

R. v. Johnson

The Supreme Court upheld Don Johnson’s first degree murder convictions, finding party liability was properly left to the jury and any charge error harmless.

  • Party liability
  • Aiding and abetting
  • Jury charge
  • Curative proviso
  • First degree murder
  • Party-liability
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Criminal law 2023 ONCA 230

R. v. Gong

Conviction for manslaughter under s.21(2) was upheld because the appellant participated in planning and facilitating the robbery, knew or ought to have known co-perpetrators would be armed and likely to encounter resistance, and the fatal shooting was a reasonably foreseeable and temporally/situationally connected consequence of carrying out the common unlawful purpose.

  • S. 21(2) criminal code
  • Manslaughter
  • Foreseeability
  • Common unlawful purpose
  • Accessory liability
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Criminal law 2021 SCC 40

R. v. Strathdee

The Supreme Court upheld a manslaughter conviction arising from a group assault, holding that co-principal liability can apply even where one assailant delivered the fatal wound.

  • Co-principal liability
  • Group assault
  • Unlawful act manslaughter
  • Causation
  • Acquittal review
  • Co-principal-liability
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Criminal law 2020 BCCA 206

R. v. Cooper

The Court of Appeal set aside firearms convictions against Malcolm Cooper and ordered a new trial, holding the trial judge used the wrong party-liability test under s. 21(2).

  • Party liability under s.21(2) criminal code
  • Foreseeability/knowledge
  • Curative proviso s.686(1)(b)(iii)
  • New trial vs acquittal
  • Party-liability
  • Criminal-appeal
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Criminal law 2016 BCSC 2575

R. v. Ziaee

The court found Zachary Scott Matheson guilty of narcotics offences after holding that the evidence proved constructive and joint possession of drugs in a stash apartment.

  • Constructive possession
  • Joint possession
  • Knowledge and control
  • Expert opinion evidence
  • S.21(1) party liability
  • Search warrant/stash house
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Criminal law 2012 ONCA 399

R. v. Ferrari

The Court held the original jury charge and recharge failed to adequately relate the evidence to the specific factual findings required to establish that a non-shooter’s conduct was an essential, substantial and integral part of the killing under s.231(5)(e); although s.21(2) party liability can supply the mens rea for first degree murder, first degree liability still requires proof that the party's acts substantially caused the death, and because the record cannot show which appellant was shooter or that the non-shooter met the substantial causation requirement the convictions for first degr…

  • First degree murder
  • Second degree murder
  • Constructive murder s.231(5)(e)
  • Party liability s.21(2)
  • Jury instructions and recharge
  • Causation/substantial causation
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Criminal law 2010 BCSC 1780

R. v. A.D.,

The court found A.D. was the person who stomped Matthew Skura and convicted him and B.G. of manslaughter; B.G. was also convicted of assault causing bodily harm.

  • Unlawful act manslaughter
  • Identification evidence
  • Parties to offence (s.21 criminal code)
  • Consent to fight (jobidon)
  • Self-defence (ss.34-37 criminal code)
  • Causation
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Criminal law 2010 BCSC 2022

R. v. El Amine

The court acquitted the accused of arson, finding he was a mere spectator, but convicted him of public mischief after holding the duress defence failed.

  • Aiding and abetting
  • Duress defence
  • Credibility assessment
  • Safe avenue of escape
  • Presence versus participation
  • Arson
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Criminal law 2009 ONCA 817

R. v. Quinn

The charge to the jury failed to clearly and correctly explain the legal basis for the appellant's liability because the trial judge did not link general principles of aiding and common purpose to the specific elements of the offences charged and conflated the unlawful purpose under s.21(2) with the offence; therefore the convictions were quashed and a new trial ordered.

  • Aiding and abetting
  • Common purpose (s.21(2))
  • Jury charge adequacy
  • Objective foreseeability
  • Robbery
  • Unlawful confinement
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Criminal law 2009 BCSC 880

R. v. Ngo

The court convicted Thong Anh Ngo of producing cannabis and possession for trafficking, finding he aided a grow operation in a secured residence.

  • Production of cannabis
  • Possession for the purpose of trafficking
  • Possession definitions
  • Aiding and abetting
  • Expert opinion admissibility
  • Voir dire
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