A St. Louis woman has gone for a nine-mile walk this weekend, one mile for each year of her missing son’s life and one mile for each of the years since he disappeared. There has been no trace of Christian Ferguson since his father called police to say a car-jacker had taken his car with the 9-year-old boy inside. The car was found a couple of hours later with no sign of the boy. He and the mother, Theda Wilson, were involved in a custody dispute at the time.