The teen's body was discovered Sept. 15 by a man walking his dogs in a wooded area west of Addicks Dam Road, more than 20 miles from where Meraz had lived and gone to school. Granados-Guevara, a tall slender man with an unruly mop of thick black hair, said little as 185th State District Court Judge Susan Brown read him his warnings. Police and prosecutors have pinned that killing on a 16-year-old MS-13 gang member, who they say stabbed him outside a bar and dumped his body in a bayou.