Homeowners in Houston opened their door Wednesday night to make a surprising discovery: a 2-year-old boy. They had no idea who he was. Security camera video shows a woman lifting a toddler by one arm to the door. She rings the bell and pounds on the door, before returning to her car, leaving the child behind. The video contained some important clues, however. The woman had long hair falling past her waist, and sported distinctive tattoos on her right arm. And she sped away in a white sedan.