U.S. Identifies El Mencho's Heir as 'El 03' in CJNG Leadership Shift

The United States National Counterterrorism Center (NCTC) has recently updated its Antiterrorism Guide to include Juan Carlos Valencia González, known by the alias "El 03," as the new leader of Mexico’s powerful Jalisco Cartel New Generation (CJNG). This designation marks a significant shift in leadership following the death of Nemesio Oseguera Cervantes, also known as "El Mencho," who was killed during a military operation in February 2026. El Mencho's demise triggered widespread violence across Mexico, raising questions about the stability and direction of the CJNG.

Valencia González, born on September 12, 1984, in Santa Ana, California, has dual US-Mexican nationality. His father is Armando Valencia Cornelio, founder of the Milenio Cartel and known as "Juanito," while his mother is Rosalinda González Valencia, a member of the notorious Valencia family that controls the CJNG's primary money laundering operations. This familial connection to both the cartel’s armed wing under El Mencho and its financial networks has positioned Valencia González at a pivotal juncture within the organization.

Despite his critical role in the CJNG for nearly two decades, Valencia González has maintained a low public profile, distinguishing himself from other prominent figures through his ability to stay out of the spotlight. His rise to the top leadership position is notable given this history and could indicate internal changes or challenges within the cartel as it navigates post-El Mencho dynamics.

The NCTC's identification of Valencia González underscores the ongoing influence of the CJNG in regional criminal activities and highlights the complex nature of power transitions within Mexican cartels. This development will likely impact law enforcement strategies and inter-cartel relations moving forward, with potential implications for security and stability across Mexico.