Intellectual disability is relevant to moral culpability in dangerous driving cases, but expert evidence must specifically link the disability to the offending conduct — general evidence of cognitive limitations is insufficient. The analogy between youth and intellectual disability in driving cases is imperfect: youth is given relatively less weight because of the well-known tendency of young drivers to drive dangerously and the importance of general deterrence, but this does not mean either youth or disability is irrelevant to moral culpability. Post-sentence evidence of deteriorating mental health in prison will not be received where it merely confirms concerns the sentencing judge anticipated and took into account.
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