SANBORN — Authorities are confirming that a body found in Redwood County is that of 81-year-old Jeanine Jackson of Sanborn.   Jackson had been missing since September 20th and her remains were located Friday afternoon along the banks of the Cottonwood River.   The Ramsey County Medical Examiner’s Office officially identified Jackson’s body on Saturday afternoon.  No word yet on the cause and manner of death.  Investigators located Jackson’s dog alive last Sunday and she was turned over to family members.