Where a defendant asserts an affirmative defense of self-defense that relies on a psychological diagnosis to justify the self-defense reaction, this may be interpreted properly as a “diminished capacity” defense, which is not recognized in Illinois.The 1st District Appellate Court affirmed the decision of Cook County Circuit Judge Allen Murphy.On June 27, 2012, Ryan McGhee was waiting at a stop light and texting on his cellphone. McGhee heard several horn blasts from behind him and proceeded into the …