15-year-old Abby was last seen walking home from school on Friday . Officials fear she may be held against her will . asked that anyone with knowledge of Abigail 's whereabouts contact authorities . Authorities said October 9 a letter to her mother purportedly from the girl appears genuine . ` ` We believe in fact that it was written by Abigail Hernandez , '' says a Conway official .
15-year-old Abby was last seen walking home from school on Friday . Officials fear she may be held against her will . Authorities said October 9 a letter to her mother purportedly from the girl appears genuine . `` We believe in fact that it was written by Abigail Hernandez , '' says a Conway official .