Mental Illness - As enacted, requires the court that finds a person incompetent to stand trial for a criminal offense due to intellectual disability to also determine whether the person is subject to involuntary care and treatment at the hearing in which the person is declared incompetent; states that the district attorney general is not required to file a complaint to require involuntary care and treatment for a person who is found incompetent to stand trial due to intellectual disability in order to commit the person. - Amends TCA Section 33-5-403.