Kingsport Authorities Are Asking For The Public’s Help In Locating A Missing Autistic Boy. 13 Year Old Isaiah Dukes Has Not Been Seen Since Monday Afternoon. Isaiah Is African American With Black Hair And Brown Eyes, Five Foot Four Inches Tall Weighing About 90 Pounds. He Was Last Seen Wearing A Grey Hooded Sweatshirt, Grey Sweatpants And Black Shoes. Anyone With Information Is Ask To Call The Kingsport Police.