The answer is no. Diminished capacity is not recognized as a defense in Illinois. However, you might instead consider whether you were not guilty by reason of insanity or guilty but mentally ill. In the that recognize diminished capacity, a legally sane defendant may present evidence of mental illness to negate the specific intent required to commit a particular crime. Diminished capacity may be caused by intoxication, trauma or disease. For example in People v. Frazier, the defendant, an Iraq military veteran, claimed his PTSD prevented him from forming the intent necessary to commit aggravated discharge of a firearm.… Continue Reading CAN I CLAIM PTSD AS A DIMINISHED CAPACITY DEFENSE IN ILLINIOS?