Child of Rage

Rob and Jill Tyler adopt 2 children named Catherine and Eric. Eric is sweet, quiet and shy and Catherine is nice at times but has these terrible violent outbursts for no apparent reason. Catherine sticks the dog with needles until the dog bleeds. She smashes Eric's head on the basement floor, causing him to go to the emergency room and tries to stab her new adoptive father with a knife while he's sleeping. (imdb)