Mexico not told of cartel arrests until kingpins were in U.S. custody
Washington Post
The capture of Sinaloa cartel leaders Ismael “El Mayo” Zambada and Joaquín Guzmán López were a historic coup for U.S. agents against a syndicate that’s flooded the United States with fentanyl.
https://www.washingtonpost.com/world/2024/07/26/sinaloa-cartel-arrests-zambada-guzman/