charlie bothuell , now 13 , was discovered in detroit basement last june .
blanket , cereal box and a bowl of chicken bones were in room with him .
on tuesday , charlie testified in court against his father and stepmother .
said home was ` very terrible place to be ' where he was regularly beaten .
claimed he was tormented with workouts and isolated from other kids .
he attempted suicide in bid to escape abusive conditions , he told court .
it is first time charlie has spoken publicly since he was found by police .
hearing is meant to determine if there is enough evidence to send the youngster 's father and stepmother to trial for ` torture and child abuse '