On the late morning of September 22, 1979, nine-year-old Mary Lou Sena and her eleven-year-old cousin Billy Sena vanished in the Martineztown neighborhood of Albuquerque. The children were last seen together near Edith Road and Mountain Road after being given permission to play on the grass at the local post office. Mary Lou, a fourth-grader at Longfellow Elementary School, was wearing a red halter top when she disappeared; Billy was a sixth-grader at Truman Middle School.

Investigators considered multiple possibilities over the years, including the children running away, a tragic accident such as being locked in a boxcar on nearby railway tracks, or abduction and foul play. Rumors that the children were murdered and buried in a neighborhood basement were never substantiated. In 2011 authorities publicly named a person of interest, Michael Cordova, who had lived with Billy’s family in 1979; another woman who lived with the family then, Liza Ramirez, was also sought for questioning. No arrests have been announced and the children’s whereabouts remain unknown.

Did anyone in Martineztown in 1979 know where Mary Lou and Billy were that day or remember seeing them near Edith Road and Mountain Road?