Just saw this: http://usnews.nbcnews.com/_news/2013/10/25/21161194-amber-alert-canceled-for-ailing-newborn-who-vanished-with-mother?lite
It was a MW attended home birth. It seems like there might be some missing info here.
So it sounds like they found her at her home after she left the apartment where she had given birth. She was supposed to take the baby to the hospital.