Where the defendant elects not to raise the defense of insanity, evidence as to defendant’s psychiatric state may be properly barred if it does not assert that defendant lacked voluntary control of her body, as the defense of diminished capacity does not exist in Illinois.The 1st District Appellate Court affirmed the decision of Cook County Associate Judge Thomas V. Gainer Jr.Around 1:50 a.m. on July 2, 2008, Tracey Jackson, a CTA bus driver working the overnight shift, stated that Robin Johnson entered the bus …