. >> reporter: rebecca sam suggest afraid to leave her daughters alone.e supposed to be -- there are supposed to be four them, but the oldest sarah was ab doublessed in april. if she could send her a miss edge, this is what she would say to her missing child. >> translator: be strong, sarah. god will help you escape if you are still alive. but if you are dead, then there is nothing that i can do for you, my child except pray that you are at peace. >> reporter: sarah and more than 200 other school girls in northeast nigeria were not the first to be kidnapped. hundreds of women and girls are still disappearing in nigeria. this some of those that have managed to escape have disturbing stories to tell. >> reporter: dealing with the physical and psychological abuse isn't easy. >> when they hear a sound, just all sound, a sounds of a gun or a sounds of something being hit, they get freeze. and that you can feel. if somebody can get freeze by hearing a sound of something, it shows the level of the that traumatic situation they pass through. >> reporter: the gove