Ill. Const. art. VI, § 4

(a) The Supreme Court may exercise original jurisdiction in cases relating to revenue, mandamus, prohibition or habeas corpus and as may be necessary to the complete determination of any case on review. (b) Appeals from judgments of Circuit Courts imposing a sentence of death shall be directly to the Supreme Court as a matter of right. The Supreme Court shall provide by rule for direct appeal in other cases. (c) Appeals from the Appellate Court to the Supreme Court are a matter of right if a question under the Constitution of the United States or of this State arises for the first time in and as a result of the action of the Appellate Court, or if a division of the Appellate Court certifies that a case decided by it involves a question of such importance that the case should be decided by the Supreme Court. The Supreme Court may provide by rule for appeals from the Appellate Court in other cases. (Source: Illinois Constitution.)