Day 674: Three of Ten SDNY-Indicted Officials Still Have Not Appeared Before FGR; El Chinacate Remanded with Extradition Warrant; Standoff Enters Day 29

On Day 674 of the Sinaloa cartel civil war — May 28, 2026 — the US-Mexico extradition standoff triggered by the April 29 SDNY indictment of Governor Rubén Rocha Moya and nine other Sinaloa officials enters its 29th day. While seven of the ten SDNY-indicted officials who remain in Mexico appeared before the FGR in Culiacán on May 26, Infobae reported on May 27 that three co-defendants have still not appeared: Alberto Jorge Contreras Núñez (former director of Sinaloa's state investigative police), José Antonio Dionisio Hipólito (former deputy director of the state police), and Juan Valenzuela Milán. Their failure to answer the FGR summons creates legal and political complications for the Sheinbaum administration's domestic accountability narrative — it weakens the argument that all indicted officials are voluntarily cooperating with Mexican legal processes. Meanwhile, El Chapo's nephew Isaí Martínez Zepeda ('El Chinacate') — arrested in Nogales, Sonora on May 26 with his brother Enoc Martínez Cepeda ('El Vocho') — was formally placed in provisional detention with extradition purposes (prisión preventiva con fines de extradición) on May 27 per Diario MX reporting. He is expected to be transferred from Sonora to the Reclusorio Norte federal detention center in Mexico City to await formal extradition proceedings to the United States. His arrest marks the second Los Chapitos-linked figure to face a US extradition warrant within two weeks, following Senator Inzunza Cazárez's voluntary surrender in San Diego on May 17. Three of the ten SDNY-indicted Sinaloa officials remain in US federal custody at the Brooklyn Metropolitan Detention Center — former Security Secretary Gerardo Mérida Sánchez, former Finance Secretary Enrique Díaz Vega, and Senator Enrique Inzunza Cazárez. Seven remain in Mexico in various legal statuses: Rocha Moya appeared before the FGR (on leave); Culiacán Mayor Juan de Dios Gámez Mendívil resigned his mayoralty to strip immunity but has not surrendered; the three listed above have not appeared at FGR; and two others appeared at FGR on May 26. El Mayo Zambada's EDNY sentencing before Judge Brian Cogan (Brooklyn, 3rd postponement) remains set for July 20, 2026 — now 53 days away — with the defense memorandum due July 6. Ovidio Guzmán López's sentencing in Chicago (NDIL, Judge Sharon Johnson Coleman) is set for July 27. On the ground in Sinaloa, La Mayiza holds approximately 90% of former Chapitos territory; 13,300+ Mexican federal troops remain deployed under interim Governor Yeraldine Bonilla Valverde. Running conflict toll: ~2,425+ homicides (Noroeste) / 3,000+ (WSJ) since September 9, 2024; ~5,800 disappearances (NGO Sabuesos Unidas AC, as of May 14, 2026).