Causation of Death: Difference between revisions

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'''Factual and Legal Causation'''<br>
'''Factual and Legal Causation'''<br>
A distinction is made between factual causation and legal causation.<ref>''R v Kippax'', [http://canlii.ca/t/fp7n6 2011 ONCA 766] (CanLII), [2011] O.J. 5494{{perONCA|Watt JA}} at 22 to 27</ref> The former being the broader of the two.   
A distinction is made between factual causation and legal causation.<ref>''R v Kippax'', [http://canlii.ca/t/fp7n6 2011 ONCA 766] (CanLII), [2011] O.J. 5494{{perONCA|Watt JA}} at 22 to 27</ref> The former being the broader of the two.   
*''Factual causation'' requires "an inquiry about how the victim came to his or her death, in a medical, mechanical, or physical sense, and with the contribution of the accused to that result"<ref>Nette{{supra}}, at para 44</ref> To put it simply, the question is "but for" the act would death have arose? <ref>Maybin{{supra}} at para 15</ref>
*''Factual causation'' requires "an inquiry about how the victim came to his or her death, in a medical, mechanical, or physical sense, and with the contribution of the accused to that result"<ref>{{supra1|Nette}}, at para 44</ref> To put it simply, the question is "but for" the act would death have arose? <ref>{{supra1|Maybin}} at para 15</ref>
*''Legal Causation'' addresses the moral element of whether the accused "should be held responsible in law for the death"<ref>Nette{{supra}} at para 45</ref>
*''Legal Causation'' addresses the moral element of whether the accused "should be held responsible in law for the death"<ref>{{supra1|Nette}} at para 45</ref>


It is not necessary for a judge to explain to a jury the distinction between legal and factual causation. The jury need only be instructed on deciding "whether the accused's actions significantly contributed to the victim's death".<ref>
It is not necessary for a judge to explain to a jury the distinction between legal and factual causation. The jury need only be instructed on deciding "whether the accused's actions significantly contributed to the victim's death".<ref>
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'''Degree of Participation in Constructive Murder'''<br>
'''Degree of Participation in Constructive Murder'''<br>
Where the offence is "constructive murder" under s. 231(5), that there is an added requirement (or enhanced Harbottle standard) that the accused be a "substantial cause of death".<ref>
Where the offence is "constructive murder" under s. 231(5), that there is an added requirement (or enhanced Harbottle standard) that the accused be a "substantial cause of death".<ref>
Nette{{supra}} at para 73<br>
{{supra1|Nette}} at para 73<br>
''R v Tomlinson'', [http://canlii.ca/t/g51wx 2014 ONCA 158] (CanLII){{perONCA|Watt JA}} at para 141<br>
''R v Tomlinson'', [http://canlii.ca/t/g51wx 2014 ONCA 158] (CanLII){{perONCA|Watt JA}} at para 141<br>
''R v Harbottle'', [http://canlii.ca/t/1fs0z 1993 CanLII 71] (SCC), [1993] 3 SCR 306{{perSCC|Cory J}}, at pp. 323-324<br>
''R v Harbottle'', [http://canlii.ca/t/1fs0z 1993 CanLII 71] (SCC), [1993] 3 SCR 306{{perSCC|Cory J}}, at pp. 323-324<br>
</ref> Given the nature of first degree constructive murder there is an added degree of participation in the killing to engage s. 231(5).<ref>
</ref> Given the nature of first degree constructive murder there is an added degree of participation in the killing to engage s. 231(5).<ref>
Tomlinson{{supra}} at para 142<br>
{{supra1|Tomlinson}} at para 142<br>
Nette{{supra}} at para 61<br>
{{supra1|Nette}} at para 61<br>
</ref>
</ref>
To that end, the Crown must prove the accused "committed an act or series of acts that are of such a nature that they must be regarded as a substantial and integral cause of the deceased’s death. An accused must play a very active role – usually a physical role – in the killing".<ref>
To that end, the Crown must prove the accused "committed an act or series of acts that are of such a nature that they must be regarded as a substantial and integral cause of the deceased’s death. An accused must play a very active role – usually a physical role – in the killing".<ref>
Tomlinson{{supra}} at para 141<br>
{{supra1|Tomlinson}} at para 141<br>
Harbottle{{supra}} at p. 324<br>
{{supra1|Harbottle}} at p. 324<br>
</ref>
</ref>


The added participation requirement still permits convictions for secondary parties.<ref>
The added participation requirement still permits convictions for secondary parties.<ref>
Tomlinson{{supra}} at para 145<br>
{{supra1|Tomlinson}} at para 145<br>
''R v Ferrari'', [http://canlii.ca/t/frpgc 2012 ONCA 399] (CanLII), 287 CCC (3d) 503{{perONCA|Rosenberg JA}}, at para 68<br>
''R v Ferrari'', [http://canlii.ca/t/frpgc 2012 ONCA 399] (CanLII), 287 CCC (3d) 503{{perONCA|Rosenberg JA}}, at para 68<br>
</ref>
</ref>
The aider's conduct must satisfy the same Hartbottle participation standard.<ref>
The aider's conduct must satisfy the same Hartbottle participation standard.<ref>
Tomlinson{{supra}} at para 145<br>
{{supra1|Tomlinson}} at para 145<br>
Ferrari{{supra}} at para 85<br>
{{supra1|Ferrari}} at para 85<br>
Harbottle{{supra}} at p. 316<br>
{{supra1|Harbottle}} at p. 316<br>
</ref>
</ref>


Revision as of 23:30, 12 January 2019

General Principles

See also: Causation

Homicide is defined in s. 222(1) as occurring where a person "directly or indirectly, by any means, ... causes the death of a human being.". Culpable Homicide (i.e. murder, manslaughter, or infanticide) is defined in section 222(5) as "when [a person] causes the death of a human being...by means of an unlawful act".

Causation is explicitly identified as existing where the death might have been otherwise "been prevented by resorting to proper means"(s. 224) or where the immediate cause of death is proper or improper treatment applied in good faith (s.225) or where the victim is already suffering from a terminal condition. (s 226)

The "Smithers test" for causation applies to all types of homicide. The test requires that the accused's act be a "significant contributing cause" of death beyond something trifling or minor. Thus, the unlawful act remains the legal cause of death even where the act by itself would not have cause death as long as it was beyond the de minimus. [1]

By implication, causation is in no way limited to a direct, an immediate, or the most significant cause.[2]

Factual and Legal Causation
A distinction is made between factual causation and legal causation.[3] The former being the broader of the two.

  • Factual causation requires "an inquiry about how the victim came to his or her death, in a medical, mechanical, or physical sense, and with the contribution of the accused to that result"[4] To put it simply, the question is "but for" the act would death have arose? [5]
  • Legal Causation addresses the moral element of whether the accused "should be held responsible in law for the death"[6]

It is not necessary for a judge to explain to a jury the distinction between legal and factual causation. The jury need only be instructed on deciding "whether the accused's actions significantly contributed to the victim's death".[7]

In terms of evidence, it is not necessary for the Crown to prove the exact mechanism by which death was caused. It is only necessary that it be proven that an unlawful act led to injuries which caused death.[8]

Degree of Participation in Constructive Murder
Where the offence is "constructive murder" under s. 231(5), that there is an added requirement (or enhanced Harbottle standard) that the accused be a "substantial cause of death".[9] Given the nature of first degree constructive murder there is an added degree of participation in the killing to engage s. 231(5).[10] To that end, the Crown must prove the accused "committed an act or series of acts that are of such a nature that they must be regarded as a substantial and integral cause of the deceased’s death. An accused must play a very active role – usually a physical role – in the killing".[11]

The added participation requirement still permits convictions for secondary parties.[12] The aider's conduct must satisfy the same Hartbottle participation standard.[13]

  1. ↑ R v Smithers, 1977 CanLII 7, [1978] 1 SCR 506, per Dickson J - defines manslaughter as “a contributing cause of death, outside the de minimis range” (p. 519)
    R v Nette 2001 SCC 78 (CanLII), per Arbour J at paras 71-72
  2. ↑ R v Maybin, 2012 SCC 24 (CanLII), per McLachlin CJ at para 20
  3. ↑ R v Kippax, 2011 ONCA 766 (CanLII), [2011] O.J. 5494, per Watt JA at 22 to 27
  4. ↑ Nette, supra, at para 44
  5. ↑ Maybin, supra at para 15
  6. ↑ Nette, supra at para 45
  7. ↑ R v Sinclair (T.) et al., 2009 MBCA 71 (CanLII), per Hamilton and Freedman JJA
  8. ↑ R v Stewart, 2003 NSCA 150 (CanLII), per Oland JA at para 30
    R v Rahman, 2014 NSCA 67 (CanLII), per Farrar JA, at para 75
  9. ↑ Nette, supra at para 73
    R v Tomlinson, 2014 ONCA 158 (CanLII), per Watt JA at para 141
    R v Harbottle, 1993 CanLII 71 (SCC), [1993] 3 SCR 306, per Cory J, at pp. 323-324
  10. ↑ Tomlinson, supra at para 142
    Nette, supra at para 61
  11. ↑ Tomlinson, supra at para 141
    Harbottle, supra at p. 324
  12. ↑ Tomlinson, supra at para 145
    R v Ferrari, 2012 ONCA 399 (CanLII), 287 CCC (3d) 503, per Rosenberg JA, at para 68
  13. ↑ Tomlinson, supra at para 145
    Ferrari, supra at para 85
    Harbottle, supra at p. 316

Deemed Causation of Death

Death that might have been prevented
224 Where a person, by an act or omission, does any thing that results in the death of a human being, he causes the death of that human being notwithstanding that death from that cause might have been prevented by resorting to proper means.
R.S., c. C-34, s. 207.


– CCC

Death from treatment of injury
225 Where a person causes to a human being a bodily injury that is of itself of a dangerous nature and from which death results, he causes the death of that human being notwithstanding that the immediate cause of death is proper or improper treatment that is applied in good faith.
R.S., c. C-34, s. 208.


– CCC

Acceleration of death
226 Where a person causes to a human being a bodily injury that results in death, he causes the death of that human being notwithstanding that the effect of the bodily injury is only to accelerate his death from a disease or disorder arising from some other cause.
R.S., c. C-34, s. 209.


– CCC

Killing by influence on the mind
228 No person commits culpable homicide where he causes the death of a human being

(a) by any influence on the mind alone, or
(b) by any disorder or disease resulting from influence on the mind alone,

but this section does not apply where a person causes the death of a child or sick person by wilfully frightening him.
R.S., c. C-34, s. 211.


– CCC

Intervening Acts

The doctrine of intervening acts can limit the scope of legal causation. The law recognizes an intervening cause that "'break the chain of causation' between the accused's acts and the death" which results in the "accused’s actions not being a significant contributing cause of death" [1]

It has been suggested that the intervening should be something that in some way is "extraordinary or unusual".[2]

  1. ↑ R v Tower 2008 NSCA 3 (CanLII), per Cromwell JA at para 25
  2. ↑ R v Sinclair (T.) et al., 2009 MBCA 71 (CanLII), per Hamilton and Freedman JJA
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