someone posted about this question awhile back, and i have the answer. if you need to extend your parental jurisdiction when your child is mentally ill and over 18, you can do it by filing extended custody. you need a lawyer and a dr to sign an affadavit that your child is mentally ill. you can do it within an emergency period and have it done in mere hours, or you can keep re-filing for years. this keeps our kids from going to jail or a state hospital, but rather get the medical help we decide necessary as their advocate. i have just had to do this with matt.