Details of Disappearance
Del Valle was last seen walking to Blackstone Elementary School on Shamut Avenue in Boston, Massachusetts during the morning hours of December 20, 1976. She was enrolled in a third-grade bilingual class there. The school was located approximately one and a half blocks from Del Valle's family's residence. She never arrived at school that day and has not been heard from again ...
The Charley Project has done an amazing job researching information for Nelida, so I'm sending you that way, if you are interested in knowing more about Nelida Del Valle.
& Exploited Children
Boston Police Department (Massachusetts)
Missing Persons Unit