Billy Sena was 11 when he and his 9-year-old cousin Mary Lou Sena were last seen on September 22, 1979, in Albuquerque’s Martineztown neighborhood. The children had gone to the post office near Edith Road and Mountain Road and never returned home. Their whereabouts have remained unknown since that day.

In 2011 a lead identified Michael Cordova, the mother’s then-boyfriend, and a woman named Liza Ramirez as persons of interest; Cordova was reportedly involved in drug activity and had severely beaten Billy shortly before the disappearance, then both Cordova and Ramirez later disappeared from view, stalling the investigation.

The case remains unsolved and the families continue to seek answers. If anyone knew Billy or Mary Lou, their routines that day, or saw them near Edith Road and Mountain Road on September 22, 1979, please come forward with information.