1. In a case in which the victim died from a single gunshot wound and the
factfinder did not find that the death-sentenced codefendant fired the fatal shot, does
it violate the Eighth Amendment or the Equal Protection Clause of the Fourteenth
Amendment to sentence the nineteen-year-old codefendant to death when his
similarly culpable seventeen-year-old codefendant may serve as little as fifteen years
in prison?

2. Does a state appellate court's death penalty review violate the Eighth
Amendment when the appellate court determines that the impact of mitigation
evidence—which could be presented at a new trial showing that the death-sentenced
codefendant was not the shooter—is inconsequential solely because he was sentenced
to death on the basis of two aggravating circumstances that were "independent" of
which codefendant shot the victim?

Whether sentencing a 19-year-old codefendant to death violates the Eighth Amendment or Equal Protection Clause when his similarly culpable 17-year-old codefendant may serve 15 years