[1] In April 1989, Mijangos stabbed her three children to death declaring she was obliged by a diabolical entity that possessed her.
[5] According to local legends, the house where she committed the crime (in the Jardines de la Hacienda colonia of Querétaro) is haunted.
[9] There, the three children were enrolled in the Catholic school Colegio Fray Luis de León, where Claudia Mijangos worked as a catechism teacher.
When Claudia was 33 years old, she began to experience severe psychotic attacks in the months preceding the murders.
These attacks reportedly involved hallucinations of demons and angels which left Claudia psychologically tormented.
Furious, Claudia defended Father Ramon and rejected Castaños's desire to rekindle their relationship.
Alfredo screamed out which awoke his eldest sister, 11-year-old Claudia Maria, came to the room and begged her mother to stop.
Wounded, Claudia María managed to leave the room and loudly pleaded her mother for mercy.