Tyler Gordon Strathdee Appellant v. Her Majesty The Queen, 2021 SCC 40

SUPREME COURT OF CANADA Citation: R. v. Strathdee, 2021 SCC 40 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. Note: This document is subject to editorial revision before its reproduction in final form in the Canada Supreme Court Reports . 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 of alberta Criminal law — Parties to offence — Co-principal liability — Group assault — Accused part of group that enteredapartment and assaulted several occupants — One occupant dying of single stab wound — Accused charged with manslaughter — Trialjudge acquitting accused on basis that single stab wound could only have been caused by one principal offender and that Crown had notproven beyond reasonable doubt that accused inflicted stab wound — Court of Appeal holding that trial judge erred in law in failing toproperly 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 CarswellAlta2352 (WL), 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), 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, onthe basis that the Alberta Court of Appeal overturned his acquittal for unlawful act manslaughter and entered a conviction. The trialjudge, sitting as judge alone, had acquitted Mr. Strathdee after considering joint/co-principal liability and abetting under s. 21(1)(

a) and21(1)(c), respectively, of the Criminal Code (2019 ABQB 479). The charges against Mr. Strathdee stemmed from a group assault inwhich 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 outsidethe scope of the group attack. [3] Having regard to the findings of fact in paras. 137 and 156-59 of the trial decision, and the statement of law set outby the Court of Appeal at paras. 61, 66 and 68 of its decision, this Court affirms the result of the Alberta Court of Appeal thatMr. 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 ifthe evidence demonstrates application of force by only a single perpetrator is not accurate. Joint/co-principal liability flows whenevertwo or more individuals come together with an intention to commit an offence, are present during the commission of the offence, andcontribute to its commission.

In the context of manslaughter, triers of fact should focus on whether an accused’s actions were asignificant contributing cause of death, rather than focusing on which perpetrator inflicted which wound or whether all of the woundswere caused by a single individual. In the context of group assaults, absent a discrete or intervening event, the actions of all assailantscan 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.