Where the defendant is incapable of raising a meritorious claim pro se for the first stage of the postconviction proceedings due to mental illness, the appellate court lacks supervisory authority to hear as-applied constitutional arguments about the defendant’s mental capabilities not raised before the circuit court.The 1st District Appellate Court affirmed the decision of Cook County Associate Judge Arthur F. Hill Jr.In 2004, Roderick Allen entered the home of his mother, Frances Allen, and stabbed his sister, Debbie …