"I want to know where he is because I have never known," Navacerrada told Reuters this week at the cemetery of Colmenar Viejo where two mass graves have been found.
A total of 108 civilians, many associated with leftist parties and unions, were executed and buried at the Colmenar Viejo cemetery between April and December of 1939.
The exhumation of the first mass grave started last year with the financial support of Spain's leftist government and led to finding the remains of 12 people.
Spain transitioned to democracy following Franco's death in 1975 but the legacy of his four-decade fascist dictatorship still divides Spanish society.
Reporting by Juan Medina Additional reporting and writing by Joan Faus Editing by Frances KerryOur Standards: The Thomson Reuters Trust Principles.
Persons:
Benita Navacerrada Lopez, Facundo Navacerrada Perdiguero, Francisco Franco, Read, Navacerrada, exhumations, Pedro Sanchez, Vox, Luis Perez Lara, San Sebastian de los Reyes, Juan Medina, Joan Faus, Frances Kerry
Organizations:
Science Society, Reuters, Socialist, People's Party, Vox, Thomson
Locations:
Colmenar, VIEJO, Spain, Madrid, Colmenar Viejo, Spanish, San Sebastian