Also known as: mitigating factors · mitigation · mitigating circumstance · mitigating circumstances
Written by attorneys · grounded in primary & secondary sources — see below
A circumstance that reduces the severity of punishment or the amount of damages awarded. Courts or juries weigh such factors to achieve individualized or equitable outcomes rather than imposing the maximum sanction or full compensatory amount.
Miles Montgomery negligently flooded Michael Miller's field during construction work. The flooding destroyed crops but also deposited nutrient-rich silt that improved soil fertility for future seasons. The court reduces the damages award by the value of the soil improvement because the tortious conduct conferred a special benefit on the harmed interest.
Mohan Malhotra and Melissa Mills, both teenagers, engaged in statutory rape. Melissa became pregnant and gave birth. At sentencing the court treats the pregnancy and resulting child as a special harm that mitigates the appropriate punishment for Mohan because the consequence already imposes a significant burden on the more endangered participant.
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Maurice Marshall was convicted of a weapons offense. The judge found a hate-crime motivation and imposed an enhanced sentence above the statutory maximum. The reviewing court vacates the enhancement because any fact that increases the penalty range beyond the maximum authorized by the jury verdict must be submitted to the jury as a sentencing factor rather than decided by the judge alone.
Matthew Martinez was convicted of capital murder. His attorney conducted no investigation into his childhood abuse, mental health history, or military service. The court finds ineffective assistance because reasonably competent counsel would have uncovered and presented those mitigating circumstances at the penalty phase to support a sentence less than death.
Magnolia Foods employee Miles Montgomery was convicted of possessing a large quantity of cocaine. State law imposed a mandatory life sentence without parole. The court upholds the sentence because the Eighth Amendment does not require individualized consideration of mitigating factors when the penalty is not death.
Michael Miller, age seventeen, was convicted of capital murder. The sentencing jury was instructed it could consider his age in deciding whether to impose death. The court reverses the death sentence because the Eighth Amendment forbids executing juveniles and requires that youth be given full consideration as a mitigating circumstance before any capital sentence.
Intellectual disability creates a categorical bar to the death penalty rather than operating merely as one mitigating factor among others. Once a defendant meets the clinical criteria, the Eighth Amendment prohibits execution regardless of how the sentencer might weigh aggravating evidence against mitigation.
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Yes. The sentencer must be allowed to consider any aspect of the defendant's character, record, or offense circumstances offered as a basis for a sentence less than death. Instructions or procedures that prevent full consideration of mitigating evidence violate the Eighth Amendment.
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A statute that automatically imposes death upon conviction for certain murders is unconstitutional because it precludes any individualized consideration of mitigating circumstances. The Eighth Amendment requires that the sentencer have discretion to impose a lesser sentence after weighing mitigation.
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…is a reasonable probability that, absent the errors, the sentencer would have concluded that the balance of aggravating and mitigating circumstances did not warrant death. Applying these standards to respondent's case, the Court concluded that counsel's performance was not constitutionally deficient. Counsel's decision not to present…