Watch: 2024 True Crime Updates: Idaho Murders, LISK, Mexico Surfer Deaths. Oxygen’s latest true crime special is exploring a murder case that took over three decades to solve. In 1984, 12-year-old Jonelle Matthews disappeared from her Greeley, Colo. home, and not even a nationwide missing child milk carton campaign-one of the first in U.S. history-proved successful in helping find her.