Source: United States Department of Justice Criminal Division
Earlier today, in federal court in Brooklyn, Carlos Alberto Guerrero Mercado and Guillermo Isaias Perez Parra, who are Mexican citizens, were arraigned on a superseding indictment charging them with conspiracy to manufacture and distribute fentanyl, conspiracy to manufacture and distribute listed chemicals, and money laundering conspiracy. Both defendants were ordered detained pending trial. The proceeding was held before United States Magistrate Judge James R. Cho. The defendants were transferred to the United States from Mexico on January 20, 2026.