In State v. Martinez-Villareal, 145 Ariz. 441, 449, 702 P.2d 670, 678 (1985), the supreme court of Arizona stated: "We have expressly held that jury questioning regarding capital punishment is permissible where the questioning determines bias of a nature which would prevent a juror from performing his duty. . . . Under the procedure used in Arizona in death penalty cases, the jurors' duty is to determine guilt or innocence, while the sentence of death is solely the responsibility of the trial judge. Nevertheless, voir dire questioning related to a juror's views on capital punishment is permitted to determine whether those views would prevent or substantially impair the performance of the juror's duties to decide the case in accordance with the court's instructions and the juror's oath."