Alleged Cartel Leader 'El Tomate' Arrested in Sonora by Mexican Navy

Key Figure in 'Demonios-Mayos' Apprehended

Martín de Jesús Contreras Zepeda, widely known by his alias 'El Tomate', was arrested on October 30, 2025, in Nogales, Sonora, Mexico. The operation was a joint effort by the Mexican Navy (Semar) and the Sonora State Prosecutor's Office. Contreras Zepeda is identified as an alleged leader within the 'Demonios-Mayos' criminal group, a cell reportedly affiliated with the powerful Sinaloa Cartel's 'Los Mayos' faction.

Details of the Arrest Operation

The arrest of 'El Tomate' was confirmed by Omar García Harfuch, head of the Secretariat of Security and Citizen Protection (SSPC), via his official social media account. Authorities stated that Contreras Zepeda was located during reconnaissance patrols in Nogales. Upon his detention, 31 doses of methamphetamine were reportedly seized. He was informed of his legal rights and subsequently placed at the disposal of the federal Public Ministry to determine his legal status. An active arrest warrant for organized crime and health-related offenses was outstanding against him.

The 'Demonios-Mayos' Criminal Group

The 'Demonios-Mayos' group, also referred to as 'Los Gigios', is described as a violent armed wing of the Sinaloa Cartel, specifically linked to Ismael Zambada Sicairos, known as 'El Mayito Flaco'. This criminal cell is implicated in a range of illicit activities, including:

• Drug trafficking: Facilitating the movement of substances such as fentanyl, methamphetamine, and heroin into the United States.
• Human trafficking: Engaging in the trafficking of individuals across the border to the U.S.
• Kidnapping and homicides: Perpetrating acts of violence, including kidnappings and murders, particularly against rival criminal factions.

The group primarily operates in the state of Sonora, a key region for cross-border illicit trade.

Impact on Organized Crime in Mexico

The apprehension of 'El Tomate' marks a significant blow to the criminal infrastructure operating in Mexico's northern border region. Authorities had designated him as a 'priority target' and a 'generator of violence'. This arrest is part of ongoing efforts by Mexican federal and state agencies to dismantle organized crime groups that challenge the rule of law and contribute to regional instability. The Mexican Navy, in particular, has been actively involved in combating drug trafficking, with recent operations resulting in substantial seizures of illicit cargo.