María Luisa González Valenzuela, often referred to as "Eva," was born in 1920 in El Salto de Juanacatlán, Jalisco, Mexico. She was one of several children in the González Valenzuela family, raised under the strict and abusive authority of their father, Isidro Torres, a local policeman. The oppressive environment, marked by severe restrictions and punishments, led the family to relocate to San Francisco del Rincón, Guanajuato, following Isidro's involvement in a fatal shooting incident.​

Alongside her sisters—María Delfina, María del Carmen, and María de Jesús—María Luisa co-operated a prostitution ring from "Rancho El Ángel" between 1950 and 1964. They lured young women under false pretenses, subjected them to forced drug addiction, physical abuse, and coerced prostitution. Victims who became ill, were deemed unattractive, or were no longer profitable were murdered through various means. The sisters' crimes were exposed in 1964 when a police investigation uncovered numerous bodies on their property.​

María Luisa was arrested, convicted of multiple charges including murder and human trafficking, and sentenced to 40 years in prison. She died of liver cancer on November 19, 1984, while still incarcerated.​