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Who Is ‘El 8’? What Officials Say About the Rocky Point Arrest

What officials and news reports say about Mauricio Espinoza Cubillas, known as “El 8”. Everything below is attributed to its source. Accusations are allegations, not findings: anyone not convicted is presumed innocent.

At a glance

Name: Mauricio Espinoza Cubillas
Known as: El 8
Latest status: For security reasons, the seven detainees were moved to Hermosillo under armed-forces escort and admitted to the Cereso prison to be arraigned before a judge. [Infobae México (republished by Lado.mx), 2026-09-21]
Link to a criminal group: a Los Mayos cell, per Sonora state prosecutors. See the Los Mayos (Sinaloa Cartel faction) profile.
On this page: 13 facts from 6 sources.

Legal status

As of September 21, 2026, he was in custody and had been placed at the disposition of the Ministerio Público so his legal status could be determined. (as of 2026-09-21) [Página Nueve, 2026-09-21]

Accusations and charges

The federal Security Cabinet said the detainees were linked to attempted aggravated homicide, crimes against public officials, possession of a vehicle with a theft report, criminal association, and forced disappearance committed by private parties. [Insurgente Press, 2026-09-21]
Authorities said the federal Attorney General's Office (FGR) would be given intervention in the case for possible organized-crime offenses and violations of the Federal Firearms and Explosives Law. [Sonora Presente, 2026-09-21]

Names and aliases

Sonora state prosecutors publicly named detained cell member Mauricio Espinoza Cubillas by the alias "El 8." [Página Nueve, 2026-09-21]
The same detainee is also publicly identified by the alias "El Comandante." [Página Nueve, 2026-09-21]
Authorities gave his full name as Mauricio Espinoza Cubillas. [Reflexión 24 Informativo, 2026-09-23]

Key events

He was detained in an operation in Puerto Peñasco, Sonora, in which authorities freed three people who had been held against their will and detained seven alleged members of the Los Mayos faction. [Página Nueve, 2026-09-21]
The operation was headed by the Army (Defensa) and Sonora's AMIC investigative agency, based on an investigation by the Sonora state prosecutor's office and information from the National Intelligence Center. [Insurgente Press, 2026-09-21]
Three agents of Sonora's AMIC were wounded when armed civilians opened fire during the operation; federal security secretary Omar García Harfuch said all three were out of danger. [Insurgente Press, 2026-09-21]
The operation and follow-up searches seized more than 40 long guns, five short guns, three machine guns, about 4,000 rounds of ammunition, improvised explosive devices, ballistic vests and tactical gear, heroin and methamphetamine, plus high-end vehicles with U.S. theft reports. [La Nación 24, 2026-09-21]
Authorities carried out two additional searches in Puerto Peñasco on the night of September 19 and the morning of September 20; one property was abandoned, and a second in the Centro neighborhood yielded methamphetamine, three high-end vehicles (two with U.S. theft reports), rifle magazines loaded with 113 rounds, and various documents. [Infobae México (republished by Lado.mx), 2026-09-21]
Seven people were detained in total, including one minor, who was not named in reporting; García Harfuch publicly recognized the three wounded AMIC agents for their bravery and professionalism. [Sonora Presente, 2026-09-21]

Our coverage

Los Mayos (Sinaloa Cartel faction) profile · Is Rocky Point safe? · More “Who is” profiles

Last reviewed: September 30, 2026. If you are named here and believe something is wrong, contact us via our corrections page.