The man sentenced to death for killing four people at a suburban pizza restaurant in 1993 has exhausted his options for appealing his sentence in state courts. The state Supreme Court today denied Nathan Dunlap's request for justices to reconsider their Sept. 10 decision upholding his death sentence. Dunlap has several other appeals pending in state courts, but the denial of his request marked the end of his appeals of his sentence, said Deputy Attorney General Ken Lane. Dunlap still could appeal his sentence in federal court, Lane said. Dunlap asked the Supreme Court to commute his death sentence and additional 113 years, claiming the trial court abused its discretion by refusing to hear additional evidence about factors that could have spared his life. He was convicted in 1996 of first-degree murder, attempted murder, robbery, theft and burglary for the Chuck E Cheese's restaurant rampage in Aurora on Dec. 14, 1993. Killed in the shooting rampage were Margaret Kohlberg, 50; Ben Grant, 17; Colleen O'Conner, 17, and Sylvia Crowell, 19. Bobby Stephens survived the shooting and later identified Dunlap as the murderer.