Supreme Court to Review Mario Aburto’s Sentence: A Deep Dive into the Case of Luis Donaldo Colosio Murrieta’s Killer

Web Editor

January 22, 2026

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Background and Relevance of Mario Aburto

Mario Aburto, a former police officer, was sentenced to 45 years in prison for the assassination of Luis Donaldo Colosio Murrieta, a presidential candidate for the Institutional Revolutionary Party (PRI) in 1994. Aburto’s case has garnered significant attention due to the high-profile nature of the crime and the legal complexities surrounding his conviction.

The Legal Background

Aburto’s legal team argued that the crime he was accused of constituted a local offense, and thus should have been tried by a local authority. They also contended that Article 10, paragraphs second and third, of the Federal Code of Criminal Procedures was unconstitutional. This argument stemmed from the belief that it violated the principle of security juridica and the right to be tried by a competent authority. Furthermore, it allowed for the infringement of jurisdictional boundaries between federal and state courts.

The Tribunal Colegiado’s Perspective

The Tribunal Colegiado, in its ruling, focused on the principle of greater benefit and the effects of the amparo due to procedural violations. They emphasized that, despite multiple procedural irregularities in Aburto’s case, the principle of greater benefit (Article 189 of the Amparo Law) offered him the most significant legal advantage by addressing his rights to personal liberty and prompt justice.

Supreme Court’s Intervention

In a 6-2 decision, the Supreme Court of Justice of the Nation (SCJN) agreed to exercise its attraction power to review Judicial Review Case 104/2021. This case was brought by Aburto himself, challenging the application of his sentence based on the Federal Criminal Code rather than the Baja California Penal Code, which would have resulted in a 30-year sentence – time already served.

Solicitations for Attraction Power

The SCJN’s review was prompted by two separate solicitations. The first came from the Federal Attorney General’s Office (FGR), while the second was from magistrates of the First Collegiate Criminal Circuit Court. Both parties sought to exercise their attraction power regarding Judicial Review Case 104/2021.

Key Questions and Answers

  • What is the main issue in Mario Aburto’s case? The central question revolves around the correct application of Mario Aburto’s sentence, either according to the Federal Criminal Code or the Baja California Penal Code.
  • Why is this case significant? This case is crucial as it deals with a high-profile assassination and raises important questions about jurisdictional boundaries in criminal law.
  • What arguments did Aburto’s legal team present? Aburto’s team argued that the crime was local and should have been tried by a local authority. They also contended that the Federal Code of Criminal Procedures was unconstitutional due to its potential to violate security juridica and the right to a competent authority.
  • What was the Tribunal Colegiado’s stance? The Tribunal Colegiado focused on the principle of greater benefit and procedural violations, ultimately deciding that this principle offered Aburto the most significant legal advantage by addressing his rights to personal liberty and prompt justice.
  • What led to the SCJN’s intervention? The SCJN agreed to review Aburto’s case following solicitations from the FGR and magistrates of the First Collegiate Criminal Circuit Court, who questioned the application of Aburto’s sentence.