The Atizapán Serial Femicide Case

The discovery in Atizapán

Andrés Filomeno Mendoza Celis was arrested in May 2021 after the disappearance and killing of Reyna González Amador led investigators to his home in Atizapán de Zaragoza. A search of the property produced human remains and personal items that opened a much larger forensic investigation.

The discovery generated highly sensational coverage, including labels such as the “Cannibal of Atizapán” and “Monster of Atizapán.” This dossier does not use those labels as factual proof of separate offenses. Its core conclusions rest instead on court convictions and prosecutor-attributed forensic findings.

Reyna González Amador and the first life sentence

The prosecution of Mendoza for the femicide of Reyna González Amador produced a life-imprisonment sentence in March 2022. Reporting on the judgment said the court found intentional and premeditated conduct and rejected the proposition that Mendoza lacked the capacity to understand his actions.

That conviction established criminal responsibility for a specific victim. It should not be treated as automatic proof of every death or disappearance later investigated around the property.

Forensic excavation and possible additional victims

State of Mexico prosecutors reported the recovery of thousands of skeletal fragments from the property. By mid-2022, authorities said the material could correspond to 19 people — 17 adult women, one child and one man — while specialists continued genetic and anthropological work.

The wording matters. “Could correspond” is not the same as 19 individually adjudicated murder victims. Fragment counts likewise cannot be converted into a victim count. Crime by Region therefore records the forensic scope without inflating it into a number of proven killings.

Multiple later convictions

The court record expanded after the first life sentence. By February 2024, Mexican reporting citing the State of Mexico Attorney General's Office said Mendoza had accumulated eight sentencing outcomes: one life term, one 92-year sentence and six separate 55-year sentences. The convictions involved femicide, homicide and crimes linked to disappearance in different victim files.

One 92-year sentence, issued in January 2023, involved femicide, homicide and disappearance-related crimes affecting a woman and a child. Additional 55-year sentences followed during 2023. In February 2024, another court imposed 55 years for the femicide and disappearance-related offense involving a woman identified publicly by the initials B.S.O.

The February 2024 sentence

Authorities said B.S.O. had disappeared in April 2012 after leaving home in Coacalco to meet someone. Investigators later attributed her killing to Mendoza at a residence in Atizapán. A judge imposed a 55-year sentence in February 2024.

That decision was reported as Mendoza's eighth conviction or sentencing outcome. Prosecutors simultaneously said investigative work would continue to identify other people whose remains or belongings might be connected to the property.

Why the case remains broader than the convictions

This case has two layers. The first is adjudicated: Mendoza has multiple convictions and extremely long sentences for specific crimes. The second remains forensic and investigative: authorities have continued efforts to identify remains, connect personal effects to missing people and determine which suspected cases can be proved in court.

Keeping those layers separate prevents a common true-crime error — treating an estimate, a confession claim, a forensic possibility or a media label as equivalent to a conviction. The existence of multiple final judgments supports classifying the prosecuted core as solved, while the broader universe of possible victims remains more complex.

Timeline

Current classification

The Atizapán Serial Femicide Case is classified Solved / Adjudicated for its prosecuted core. Andrés Filomeno Mendoza Celis has been convicted repeatedly in separate femicide, homicide and disappearance-related proceedings. The classification does not imply that every possible victim uncovered in the forensic investigation has been identified or that every suspected killing has been adjudicated.

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