All capital cases shall be assigned as soon as they are at issue and their disposition will be in substantial compliance with the time limits set in Section 701.13(D) of Title 21. Upon submission, this Court shall conduct a mandatory sentencing review, wherein this Court shall consider the punishment imposed as well as any claimed errors. With regard to punishment, this Court shall determine: (1) Whether the sentence of death was imposed under the influence of passion, prejudice or any other arbitrary factor, and (2) whether the evidence supports a jury's or judge's finding of a statutory aggravating circumstance.