NEW : Child 's adoptive father is in custody as a suspect , official says . Parents told police they had n't seen baby Thomas in weeks . Child had ` ` suffocation issue '' in infancy at 6 weeks of age , was quadriplegic . Child was found stuffed in trash bag , covered with mothballs .
NEW : Child 's adoptive mother is in custody as a suspect , official says . Relatives told police they had n't seen Shylea Thomas in weeks . Child had `` suffocation issue '' in crib at 3 weeks of age , was quadriplegic . Body was found stuffed in trash bag , covered with mothballs .