A U.S. federal grand jury voted Thursday to widen the criminal case against Audias Flores Silva, the man Mexican authorities once identified as a possible successor to the Jalisco New Generation Cartel’s top leadership. The updated indictment adds charges of methamphetamine trafficking and conspiracy to launder money to the cocaine and heroin offenses lodged against him in August 2020, the Associated Press reported, citing court documents.

Flores Silva, known by the alias “El Jardinero” or “The Gardener,” was captured on April 27 in the western state of Nayarit. Mexican Navy special forces carried out the operation, acting on intelligence supplied by U.S. agencies. His arrest, announced by Mexican and American officials last month, was immediately described as a significant blow to the cartel’s command structure.

The timing of the expanded charges places additional legal weight on a figure who had risen to become the organization’s second-in-command. Nemesio Oseguera Cervantes, the cartel’s founder and leader known as “El Mencho,” was killed in February during an army operation in Jalisco state. Flores Silva, 45, had previously served as Oseguera Cervantes’ head of security before taking over direct oversight of drug production and trafficking across a swath of central and western Mexico.

According to Mexican authorities, Flores Silva’s sphere of control grew to encompass Nayarit, Jalisco, Mexico state, and Zacatecas. In those territories, investigators say, he supervised not only the movement of narcotics but also the operation of clandestine drug laboratories, fuel theft, and extortion rackets. The expanded U.S. charges now formally allege that his trafficking activities included methamphetamine — a highly profitable synthetic drug — and that he participated in schemes to clean the proceeds.

The Jalisco New Generation Cartel, widely identified by its Spanish initials CJNG, has been designated a foreign terrorist organization by the United States government since February. The designation, applied to the CJNG and seven other criminal groups, marks an escalation in the U.S. approach to Mexican trafficking organizations. The CJNG is considered the largest cartel in Mexico, with a documented presence in 21 of the country’s 32 states and a footprint that stretches into several other nations, including the United States.

The 2020 indictment originally charged Flores Silva with trafficking cocaine and heroin. Thursday’s superseding indictment reflects a broader portrait of his alleged role in a sprawling enterprise that moves multiple drug types across international borders and launders its earnings.

If convicted on the new charges, Flores Silva faces a sentence ranging from 10 years to life in prison. The Associated Press reported his case is being prosecuted in a U.S. federal court, though the district was not immediately specified in the publicly available information. The arrest and legal proceedings underscore the continued cooperation between Mexican security forces and U.S. law enforcement agencies in targeting the upper echelons of transnational drug trafficking organizations.

The CJNG has weathered leadership losses before, but the back-to-back removal of Oseguera Cervantes and Flores Silva represents a striking disruption to the cartel’s hierarchy in less than three months. Security analysts have cautioned that decapitation strategies often fragment criminal organizations rather than dismantle them, and the full consequences of the leadership void remain to be seen.

For now, the U.S. indictment against Flores Silva adds yet another layer to the international effort to hold the cartel’s commanders accountable. The coming legal proceedings will test the evidence assembled by U.S. prosecutors and, if it holds, could deliver one of the most consequential cartel convictions in recent years.