A former longshot Idaho gubernatorial candidate was indicted Tuesday in the murder of Jonelle Matthews, a 12-year-old Colorado girl whose disappearance after a holiday concert in 1984 was a mystery for decades. Jonelle died from a single gunshot wound to her forehead, Weld County District Attorney Michael Rourke said. Jonelle’s family searched fruitlessly for years as her picture was printed on milk cartons during a national missing-children campaign in the 1980s.