A high-stakes investigation into the dismantling of a major narcotics laboratory in Chihuahua has revealed that U.S. Agents were operating “informally” within the offices of the state’s Strategic Operations Prosecutor’s office days before a fatal operation. The revelations, delivered during a press conference Tuesday, suggest a level of coordination between foreign agents and local authorities that bypassed official channels and legal authorization.
Wendy Chávez Villanueva, head of the Specialized Unit investigating the “El Pinal” drug lab bust, disclosed that evidence now places U.S. Personnel at the Fiscalía’s facilities on at least two separate dates prior to the April 19 operation. Most strikingly, surveillance footage from April 16 shows one of the foreign nationals inside the facility carrying a long gun, though investigators noted the weapon was held in a vertical position and was not deployed.
The disclosure adds a layer of complexity to an already grim case. The operation culminated in a tragic accident that claimed the lives of two U.S. Agents and Pedro Román Oseguera Cervantes, the then-head of the State Investigation Agency (AEI). The current inquiry is now focused on why these agents were present in a sensitive government installation without formal documentation or the knowledge of superior authorities.
According to Chávez Villanueva, there is currently no record showing that Oseguera Cervantes or any other involved public servant requested the necessary permits for foreign agents to participate in the “El Pinal” operation. This lack of authorization raises significant questions about the breach of sovereignty and the operational protocols followed by the AEI during the lead-up to the raid in the municipality of Morelos.
Unsanctioned Presence and ‘Informal’ Interaction
The investigation has pivoted toward a “pattern of convivencia”—informal social interaction—between the foreign nationals and agents of the AEI. Digital evidence suggests these individuals converged in and around the Strategic Operations office hours before the convoy departed for the target site. Despite their presence, the agents did not wear uniforms or display official insignia of the AEI, further emphasizing the clandestine nature of their involvement.
While the presence of the agents is confirmed, the Fiscalía emphasized that they have not yet found evidence that the U.S. Personnel were providing training, instruction, or exercising command over Mexican authorities, functions that are strictly reserved for domestic agencies.
The scale of the current probe is exhaustive. To date, the Specialized Unit has processed a massive volume of evidence to reconstruct the events:
- Digital Evidence: Over 6,000 hours of surveillance footage from various security points.
- Testimony: Approximately 50 ministerial statements, including interviews with 45 members of the State Attorney General’s Office (FGE).
- Documentation: Inspection of roughly 500 documents and more than 10 forensic reports.
Timeline of the ‘El Pinal’ Investigation
The following timeline outlines the key dates identified by the Fiscalía in the lead-up to and aftermath of the operation.
| Date | Event | Key Detail |
|---|---|---|
| April 16 | Initial Sighting | U.S. Agent spotted inside Fiscalía with a long gun. |
| April 19 | The Operation | Dismantling of “El Pinal” lab; fatal accident occurs. |
| Post-April 19 | Joint Inquiry | FGE and FGR begin analyzing digital and documentary evidence. |
| Tuesday (Current) | Public Disclosure | Fiscalía confirms informal presence of U.S. Agents. |
Diplomatic Silence and Unidentified Personnel
Despite the evidence gathered by Mexican authorities, a significant void remains regarding the identity and status of the foreign nationals. Chávez Villanueva stated that the State Attorney General’s Office has not received a formal response to information requests sent to the U.S. Diplomatic and consular representations or the National Migration Institute (INM).
two of the individuals involved remain officially unidentified. The Fiscalía is still working to determine their specific roles, their migratory status in Mexico, and whether they were officially attached to any U.S. Security, consular, or diplomatic agency.

The state government maintains that This proves collaborating “permanently and unrestricted” with the Federal Attorney General’s Office (FGR), providing all digital logs and documentary evidence to ensure the federal government has a complete picture of the breach in protocol.
Disclaimer: This report concerns an ongoing criminal and administrative investigation. All individuals mentioned are subject to the presumption of innocence until proven otherwise in a court of law.
The investigation remains open as the Fiscalía continues to cross-reference digital records with field work. The next critical milestone will be the potential response from U.S. Diplomatic channels, which is required to formally identify the personnel and clarify the nature of their mission in Chihuahua.
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