I just think that the only way Hannah is still alive is if someone has her and is holding her. She would have come back by now if JM was keeping her. If you read her Twitter, you can see that she mentions her dad a lot, very fondly, and she was super duper eager to get back to C-ville and start school again. She kept saying things like "I wanna go back to school", "Been home a week and already excited for school"... But even though she'd rather be at school, she posted text conversations with her father in which they joked around and stuff. She loved her life. What a waste.