The bus coming from Camarón de Tejeda and heading towards Córdoba carried an amateur soccer team.
The prosecutor's office for Oaxaca state said that all the victims were residents of Córdoba, Veracruz.
The 81-year-old woman is forced to work to help her grandson continue studying.
"El cuerpo presentaba mutilación genital, desfiguración de rostro, y signos de abuso sexual", informó hoy la Federación Argentina de lesbianas, gays, bisexuales y trans, que calificó el hecho como un "aberrante crimen"