... State child services workers got a tip June 17 and found the boy in a dark room with only a mattress, a box spring and a plastic jar apparently used as a toilet, Gwinnett County police said in a statement. The boy had been in the room, without toys or books and without going to school for most of two years, and a lock was put on the outside of the door in January 2013, police said. Investigators found no signs of malnourishment or abuse to the 13-year-old or his nine siblings, who were not confined, according to police....