Former Chihuahua attorney general César Jáuregui Moreno faces treason allegations over the reported involvement of U.S. intelligence agents in a Mexican drug operation, accusations his defense denies.
The arrest of former Chihuahua attorney general César Jáuregui Moreno has become a dispute over whether state officials unlawfully allowed U.S. intelligence personnel to participate in a Mexican counternarcotics operation.
On October 19, President Claudia Sheinbaum publicly defended the investigation and criticized the former prosecutor’s alleged conduct. Jáuregui’s lawyer rejected the central accusation, saying his client neither ordered nor authorized the participation of foreign agents.
The case concerns an operation against a suspected drug laboratory in the Sierra Tarahumara region of Chihuahua earlier in 2026. Mexican authorities allege that U.S. intelligence agents participated without the authorization required for foreign personnel to conduct operations inside Mexico.
According to reporting by Reuters, two U.S. embassy employees and two members of Chihuahua’s state prosecutor’s office died in a vehicle accident associated with the operation. Their deaths brought additional scrutiny to how the operation had been organized, who approved it and what information had been shared with federal authorities.
Mexican prosecutors subsequently investigated the circumstances of the foreign participation. Federal authorities have accused Jáuregui of treason and unlawful conduct connected with his official responsibilities. Those are allegations, not findings of guilt.
Jáuregui was detained on October 17. The state prosecutor’s office is also investigating separate allegations related to his time in office, according to statements reported on October 19. The available accounts do not fully establish the precise scope or procedural status of every accusation.
During her October 19 news conference, Sheinbaum said the former prosecutor had acted irresponsibly by allegedly allowing foreign personnel to take part in an operation outside the legal authority of state officials. She emphasized that intelligence cooperation with the United States is permitted but that direct foreign operational participation on Mexican territory is subject to legal restrictions.
The case also has implications for Chihuahua’s state government. Governor Maru Campos publicly supported the principle that officials must be subject to the law. Sheinbaum said the evidence discussed so far did not establish wrongdoing by the governor.
Jáuregui’s defense disputes the government’s account. Attorney Héctor Villasana said there was no evidence that his client knew about or authorized the involvement of CIA personnel. Villasana argued that statements and evidence in the investigation instead pointed toward Pedro Oseguera, a now-deceased official who headed the state’s investigative and strategic-operations agency.
That disagreement is central. Prosecutors must establish not merely that foreign personnel participated, but what Jáuregui knew, whether he authorized their actions and which legal duties he allegedly violated.
This also raises questions about the relationship between federal and state security agencies. Mexican law regulates cooperation with foreign agents, and the case may clarify how responsibility is assigned when an operation crosses institutional boundaries.
