Guilty but mentally ill: Reform of the insanity defense in Illinois

In 1981 Illinois joined several other states by passing a “guilty but mentally ill” statute. Passed as a response to perceived inadequacies in the existing insanity defense, the statute was intended to protect society better, to provide treatment for offenders, and to compel the offender to assume greater responsibility for his or her criminal acts. This study, based on court data and responses to a survey of state prosectors, suggests that the statute has not been successful in reaching its major objectives. GBMI offenders often may be placed on probation, infrequently receive treatment when institutionalized, and may use the plea to absolve themselves of responsibility for their acts.