Claudia Mijangos

On April 23, 1989, Claudia's husband picked up their children from school and brought them to Claudia's house. There, Castaños and Claudia engaged in an intense argument. He probed her about Father Ramon and articulated his desire to get back together. Furious, Claudia defended Father Ramon and rejected Castaños's desire to rekindle their relationship. Before he left, Claudia threatened Castaños saying he would be sorry. After locking the door behind him, Claudia went upstairs to tuck her children in bed and went to sleep.

A few hours later on April 24, 1989, at around 4 in the morning, Claudia Mijangos awoke to loud voices in her head. She stated that the voices told her Mazatlan had disappeared and that "all of Queretaro was a spirit". Desperate, Claudia called her friend Veronica Vazquez who asked Claudia to calm down. Her friend Veronica promised to come in the morning to help her. Following the call, Claudia got out of bed, dressed, went to the kitchen and took three knives while her children still slept peacefully.

In the late 1980s Claudia and her husband Alfredo began to develop marital problems. She began to display signs of emotional instability, according to relatives and friends. The couple attended marriage counseling with Dr. Jaime Flores of Instinto Asesino, a television show on Discovery Channel. Dr. Flores asserted that the power struggle apparent within the marriage was irreconcilable. Shortly after, Claudia became obsessed with Father Ramón, another teacher at the Colegio Fray Luis de León. Claudia and Alfredo separated in 1989.

Claudia Mijangos Azrac (born 26 May 1956, in Mazatlan, Sinaloa) is a Mexican murder ex-convict who was condemned in 1990 for filicide. Mijangos stabbed her three children to death declaring she was obliged by a diabolical entity that possessed her. She was diagnosed with Schizoaffective disorder and temporal lobe epilepsy. Therefore, she was only condemned to 30 years in prison, the minimum sentence for such a crime in Mexico.