Mary Lou Sena, aged 9, was last seen on September 22, 1979, in Albuquerque, New Mexico. She and her cousin, 11-year-old Billy Sena, left their home in the Martineztown neighborhood around 10:00 a.m. to visit the post office and play on the grass nearby. The children never returned home, and their whereabouts remain a mystery. Several theories emerged regarding their disappearance, including the possibility that they accidentally got locked in a railcar or were abducted.
Years later, in
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Last Seen: Sep 22, 1979