By Stephanie McCrummen, Published: May 25, 2013
HOUSTON — The mother drives her son everywhere because he is not well enough to drive. He sits next to her, and at the red lights she looks over and studies him: how quiet he is, how stiffly he sits, hands in his lap, fingers fidgeting slightly, a tic that occasionally blooms into a full fluttering motion he makes with his hand, as if clearing invisible webs from his face. He is 19 years old, 6 feet tall, 250 pounds. His eyes are more steady than bright at this particular moment; his mouth is not set in a smile or a frown but some line in between.