It wasn't long before Jennifer Williams noticed there was something unusual about the two young girls she was fostering. Three-year-old Arya Hernandez was bright, outgoing, and without any of the behavioral issues Williams had become accustomed to over more than a decade as a foster parent in Georgia. But 4-month-old Emma seemed sickly. The baby's soft spot was too big for her age and in the wrong part of her head, and the whites of her eyes were discolored. She was also bowlegged and held her limbs in an unusual, awkward way.
