Mexican federal authorities have arrested former Chihuahua Attorney General César Jáuregui Moreno on suspicion of treason in connection with an anti-drug operation that allegedly involved unauthorized participation by personnel from the U.S. Central Intelligence Agency (CIA). The arrest follows an investigation into an April operation in northern Mexico that resulted in the discovery of a clandestine drug laboratory and was followed by a vehicle accident that killed four people.

Federal Attorney General Ernestina Godoy announced the arrest on October 17, saying a federal judge issued the warrant following more than 100 investigative actions conducted by Mexican prosecutors. Investigators allege that Jáuregui ordered and coordinated an irregular operation in El Pinal, a community in the municipality of Morelos, Chihuahua. Federal authorities subsequently secured and dismantled the suspected drug laboratory connected to the operation.

According to the Federal Attorney General's Office, the investigation found that foreign personnel participated in the operation without authorization from Mexico's federal government. Prosecutors allege that Jáuregui permitted U.S. intelligence personnel to exercise responsibilities reserved for Mexican federal authorities, raising questions about the legality of their involvement and the chain of command responsible for the mission.

The operation came under scrutiny after a vehicle accident during the return from the mountainous area killed two Mexican officials from the Chihuahua state prosecutor's office and two U.S. nationals. The Americans were identified in subsequent reporting as believed to be CIA personnel. Mexican investigators examined the circumstances of their participation, including their contacts with state authorities and the authorization procedures governing foreign intelligence activity.

Godoy said the alleged conduct represented a violation of Mexico's constitutional framework and national security laws, which restrict state authorities from transferring federal responsibilities to foreign governments. Under Mexican law, foreign personnel cannot independently exercise law enforcement or national security powers without the appropriate legal authorization. Prosecutors maintain that the alleged involvement of unauthorized U.S. personnel went beyond permitted security cooperation.

The case also involves separate allegations of misconduct in public office. Mexican authorities detained Jáuregui in Chihuahua, with earlier state-level reporting identifying accusations relating to the unlawful exercise of public functions and coordination among public officials. The federal treason investigation concerns the alleged transfer of sovereign security responsibilities to foreign personnel, making it a separate and more consequential legal issue.

Mexico and the United States maintain extensive cooperation against drug trafficking organizations, including intelligence sharing and coordinated investigations targeting clandestine laboratories, trafficking networks and organized criminal groups. However, the limits of U.S. involvement in operations conducted on Mexican territory remain politically and legally sensitive. President Claudia Sheinbaum has emphasized that intelligence cooperation does not authorize foreign agents to independently participate in Mexican security operations.

The allegations introduce further scrutiny of how U.S. intelligence personnel operate alongside Mexican security agencies and whether authorization procedures were followed in the April mission. The U.S. Embassy has declined to comment on the case, according to Reuters, while the full extent of the alleged CIA involvement has not been independently established.

Jáuregui has not been convicted, and the allegations remain subject to judicial proceedings. Mexican prosecutors have not announced a final determination concerning the criminal responsibility of other officials involved in the operation. Further developments are expected as federal authorities pursue the investigation and present evidence before the courts.