This tale has existed in Mexico since Aztec times. And it received many chances.
La Llorona was a woman with a cruel heart.
Luisa a beautiful and peasant girl who fell in love with Mr. Muno Montes Claros and bore him three sons. When Muno abandoned her to marry a woman of his own class, Luisa murdered the three children and she felt tormented and killed her self and then her spirit started wandering through the streets of the city at night shrieking and sobbing.
She wore a white robe and when people met her they asked her to remove her veil and show her pretty face. When she uncovered her face people saw a skull.
Every night this woman wanders in the streets and fields of my country and looks her children.