Guillermo Arturo Zuany Portillo has resigned from his position as the prosecutor for Strategic Operations and Anti-Kidnapping at the Chihuahua State Attorney General’s Office (FGE). The resignation follows allegations of his probable responsibility regarding the involvement of four U.S. Agents in an operation to dismantle a drug laboratory.
Investigation into Unauthorized Presence
The drug lab in question was located in the community of El Pinal, within the municipality of Morelos in the Sierra Tarahumara. The resignation was triggered after a special investigation unit, led by prosecutor Wendy Chávez Villanueva, provided updated information that led to an administrative procedure regarding a possible omission by Zuany Portillo.
According to prosecutor Wendy Chávez, the four U.S. Agents who accompanied state police during the operation were seen at the facilities of the Chihuahua Specialized Prosecutor’s Office for Strategic Operations. These visits occurred on two separate dates prior to April 16.
Evidence of Informal Ties
Investigations revealed a pattern of informal interaction and conviviality between the foreign agents, the director general of the State Investigation Agency (AEI), Pedro Oseguera Cervantes, and the now former prosecutor Zuany Portillo.

Security cameras and surveillance points showed these individuals converging near the Specialized Prosecutor’s Office for Strategic Operations. These meetings were determined to be unrelated to any official training or instruction.
the U.S. Agents were not wearing AEI tactical uniforms or any official insignias from a security agency during these encounters.
Potential Implications
The disclosure of these informal links may lead to further scrutiny of the State Investigation Agency’s leadership. Additional administrative procedures could be initiated to determine the extent of the knowledge and intervention of other officials involved.
The case could also result in a review of how foreign agents are permitted to interact with state law enforcement in the Sierra Tarahumara region to prevent future omissions of protocol.
Frequently Asked Questions
Why did Guillermo Arturo Zuany Portillo resign?
He resigned due to his probable responsibility and a possible omission regarding the case of four U.S. Agents who participated in an operation to dismantle a drug lab in El Pinal, Morelos.
What evidence was used to link the former prosecutor to the U.S. Agents?
The investigation used security camera footage and surveillance points showing the agents converging with Zuany Portillo and AEI Director Pedro Oseguera Cervantes in informal contexts, unrelated to training.
Did the U.S. Agents identify themselves with official gear?
No. According to the investigation, the agents did not wear official security agency insignias or AEI tactical uniforms during their interactions at the prosecutor’s facilities.
Do you believe informal cooperation between international agents and local prosecutors undermines legal protocols?
