A drunk driver who killed a woman 13 years ago is returning to prison after he was caught drunk driving again.The man, Eric Jeffery Biles, 49, was found in violation of his probation for the crime of vehicular homicide and was ordered by Circuit Court Judge Bart Stanley to serve the rest of his sentence behind bars. His sentence lasts until September 2020.Biles was given a 12-year sentence for the wreck that killed his passenger, Susan Elizabeth Delp, in 2001. Investigators say Biles was driving under the influence and driving recklessly when his car ran off Highway 127 and struck a tree on April 16.Biles entered guilty pleas in 2003 to charges of vehicular homicide by intoxication and possession of meth from the fatal wreck.