R. v. Strathdee
- Citation
- 2021 SCC 40
- Status
- Judgment
- Jurisdiction
- Canada
- Court
- Supreme Court of Canada
- Decision
- 15 October 2021
- Posture
- Criminal Appeal / Appeal to the Supreme Court of Canada; Judgment on Appeal From the Alberta Court of Appeal
- Language
- English
More details
- Court
- Supreme Court of Canada
- Decision
- 15 October 2021
- Posture
- Criminal Appeal / Appeal to the Supreme Court of Canada; Judgment on Appeal From the Alberta Court of Appeal
- Language
- English
On this page
Professional case brief
Research organized from the available case record
01
Holding and result
The Court affirmed conviction because the stabbing was within the scope of the group attack and the appellant's participation in the group assault was a significant contributing cause of the victim's death, so co‑principal liability applied notwithstanding that only one assailant inflicted the fatal wound; the trial judge erred by isolating which individual caused the wound rather than assessing contribution to the death.
Court disposition
Appeal dismissed; conviction for unlawful act manslaughter affirmed.
Orders
- Appeal dismissed.
- Conviction for unlawful act manslaughter entered by the Alberta Court of Appeal is affirmed.
02
Material facts
Parties
Tyler Gordon Strathdee
Appellant Counsel: Graham Johnson; Tania ShapkaHer Majesty The Queen
Respondent Counsel: Julie MorganAmounts and remedies
- Case Number: 39,556
- Decision Year: 2,021
03
Procedural history
Posture
Criminal Appeal / Appeal to the Supreme Court of Canada; Judgment on Appeal From the Alberta Court of Appeal
04
Questions and positions
Legal issues
- 01
Whether an accused can be convicted as a co‑principal for manslaughter when only a single fatal stab wound was inflicted by an unknown member of a group
- 02
Whether the stabbing was within the scope of the group attack or a distinct intervening act
- 03
Whether the trial judge erred by focusing on which individual inflicted the fatal wound rather than on whether the accused's actions were a significant contributing cause of death
Party arguments
- Applicant
- The appellant argued the acquittal was proper because the Crown failed to prove beyond a reasonable doubt that he inflicted the fatal stab wound and the evidence showed only a single perpetrator applied the fatal force.
- Respondent
- The Crown argued the appellant was properly convicted as a co‑principal because he participated in the group assault and, absent a discrete intervening act, the actions of all assailants can be a significant contributing cause of death even if a single assailant inflicted the fatal wound.
05
Court’s reasoning
Legal principles
- 01
R. v. Strathdee, 2021 SCC 40; Criminal Code ss.21(1)(a),(c)
Joint/co‑principal liability arises when two or more individuals come together with an intention to commit an offence, are present during its commission, and contribute to its commission.
- 02
R. v. Strathdee, 2021 SCC 40
In manslaughter, triers of fact should focus on whether an accused's actions were a significant contributing cause of death rather than on which perpetrator inflicted which wound.
- 03
R. v. Strathdee, 2021 SCC 40; discussion consistent with R. v. Pickton, 2010 SCC 32
Absent a discrete or intervening event, the actions of all assailants in a group assault can constitute a significant contributing cause to all injuries sustained, including fatal injuries caused by one participant.
06
Ratio, limits and disposition
Ratio decidendi
The Court affirmed conviction because the stabbing was within the scope of the group attack and the appellant's participation in the group assault was a significant contributing cause of the victim's death, so co‑principal liability applied notwithstanding that only one assailant inflicted the fatal wound; the trial judge erred by isolating which individual caused the wound rather than assessing contribution to the death.
Obiter and limits
- Clarification that any implication from R. v. Cabrera that joint/co‑principal liability is automatically negated when only a single perpetrator applied force is incorrect.
- Proper reading of R. v. Pickton is consistent with the principle that contribution to the fatal result is the focus in party liability for manslaughter.
Court disposition
Appeal dismissed; conviction for unlawful act manslaughter affirmed.
- Appeal dismissed.
- Conviction for unlawful act manslaughter entered by the Alberta Court of Appeal is affirmed.
Source and reliance status
Supreme Court of Canada · 15 October 2021
This page organises the available record for research. Confirm quotations, current status, and subsequent treatment against the official source before relying on the case.
Judgment reading view
Judgment text
The complete available source text.
Supreme Court of Canada
Judgment· 15 October 2021
R. v. Strathdee Collection Supreme Court Judgments Date 2021-10-15 Neutral citation 2021 SCC 40 Report [2021] 3 SCR 52 Case number 39556 Judges Wagner, Richard; Moldaver, Michael J.; Karakatsanis, Andromache; Côté, Suzanne; Brown, Russell; Rowe, Malcolm; Martin, Sheilah; Kasirer, Nicholas; Jamal, Mahmud On appeal from Alberta Notes SCC Case Information Decision Content
SUPREME COURT OF CANADA Citation: R. v. Strathdee, 2021 SCC 40, [2021] 3 S.C.R. 52 Appeal Heard: October 15, 2021 Judgment Rendered: October 15, 2021 Docket: 39556 Between: Tyler Gordon Strathdee Appellant and Her Majesty The Queen Respondent Coram: Wagner C.J. and Moldaver, Karakatsanis, Côté, Brown, Rowe, Martin, Kasirer and Jamal JJ. Unanimous Judgment Read By: (paras. 1 to 5) Rowe J. Tyler Gordon Strathdee Appellant v. Her Majesty The Queen Respondent Indexed as: R. v. Strathdee 2021 SCC 40 File No.: 39556. 2021: October 15. Present: Wagner C.J. and Moldaver, Karakatsanis, Côté, Brown, Rowe, Martin, Kasirer and Jamal JJ. on appeal from the court of appeal for alberta Criminal law — Parties to offence — Co‑principal liability — Group assault — Accused part of group that entered apartment and assaulted several occupants — One occupant dying of single stab wound — Accused charged with manslaughter — Trial judge acquitting accused on basis that single stab wound could only have been caused by one principal offender and that Crown had not proven beyond reasonable doubt that accused inflicted stab wound — Court of Appeal holding that trial judge erred in law in failing to properly assess accused’s culpability as co‑principal to manslaughter in light of her finding that accused participated in group assault — Court of Appeal setting aside acquittal and entering conviction — Conviction upheld. Cases Cited Referred to: R. v. Cabrera, 2019 ABCA 184, 95 Alta. L.R. (6th) 258, aff’d R. v. Shlah, 2019 SCC 56, [2019] 4 S.C.R. 136; R. v. Pickton, 2010 SCC 32, [2010] 2 S.C.R.
198. Statutes and Regulations Cited Criminal Code, R.S.C. 1985, c. C‑46, ss. 21(1)(a), (c), 691(2)(b). APPEAL from a judgment of the Alberta Court of Appeal (Fraser C.J. and Watson and Pentelechuk JJ.A.), 2020 ABCA 443, 21 Alta. L.R. (7th) 72, 410 C.C.C. (3d) 46, 463 D.L.R. (4th) 193, [2021] 5 W.W.R. 456, [2020] A.J. No. 1357 (QL), 2020 CarswellAlta 2352 (WL Can.), setting aside the acquittal of the accused for manslaughter entered by Goss J., 2019 ABQB 479, [2019] A.J. No. 853 (QL), 2019 CarswellAlta 1310 (WL Can.), and entering a conviction. Appeal dismissed. Graham Johnson and Tania Shapka, for the appellant. Julie Morgan, for the respondent. The judgment of the Court was delivered orally by [1] Rowe J. — Mr. Strathdee appeals as of right to this Court under s. 691(2)(b) of the Criminal Code, R.S.C. 1985, c. C‑46, on the basis that the Alberta Court of Appeal overturned his acquittal for unlawful act manslaughter and entered a conviction (2020 ABCA 443, 21 Alta. L.R. (7th) 72). The trial judge, sitting as judge alone, had acquitted Mr. Strathdee after considering joint/co‑principal liability and abetting under s. 21(1)(a) and 21(1)(c), respectively, of the Criminal Code (2019 ABQB 479). The charges against Mr. Strathdee stemmed from a group assault in which several victims sustained multiple injuries and one victim, Mr. Tong, sustained a single stab wound which caused his
death. [2] We agree with the Court of Appeal that there is no basis for the view that the stabbing of Mr. Tong was a distinct act outside the scope of the group attack. [3] Having regard to the findings of fact in paras. 137 and 156‑59 (CanLII) of the trial decision, and the statement of law set out by the Court of Appeal at paras. 61, 66 and 68 of its decision, this Court affirms the result of the Alberta Court of Appeal that Mr. Strathdee is guilty of unlawful act manslaughter. [4] We also wish briefly to clarify a statement of law in R. v. Cabrera, 2019 ABCA 184, 95 Alta. L.R. (6th) 258, aff’d R. v. Shlah, 2019 SCC 56, [2019] 4 S.C.R.
136. Any implication from Cabrera that joint/co‑principal liability is automatically eliminated if the evidence demonstrates application of force by only a single perpetrator is not accurate. Joint/co‑principal liability flows whenever two or more individuals come together with an intention to commit an offence, are present during the commission of the offence, and contribute to its commission. In the context of manslaughter, triers of fact should focus on whether an accused’s actions were a significant contributing cause of death, rather than focusing on which perpetrator inflicted which wound or whether all of the wounds were caused by a single individual. In the context of group assaults, absent a discrete or intervening event, the actions of all assailants can constitute a significant contributing cause to all injuries sustained. Properly read, the discussion of party liability in R. v. Pickton, 2010 SCC 32, [2010] 2 S.C.R. 198, is fully consistent with the foregoing. [5] Accordingly, we would dismiss the appeal. Judgment accordingly. Solicitors for the appellant: Dawson Duckett Garcia & Johnson, Edmonton. Solicitor for the respondent: Attorney General of Alberta, Calgary.
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