A package bomber who created a wave of terror across the South is scheduled to be executed in Alabama, nearly 30 years after killing a federal judge with a bomb mailed to his home.

Walter Leroy Moody Jr., 83, is scheduled to receive a lethal injection Thursday. At his 1996 trial, prosecutors described Moody as a meticulous coward who committed murder by mail because of his obsession with getting revenge on the legal system, and then committed more bombings to make it look like the Ku Klux Klan was behind the judge’s murder.