Will El Mayo’s arrest slow the spread of fentanyl?

More will emerge about how the men came to be detained. Perhaps Mr Gúzman López, another Sinaloa bigwig like his three brothers, helped the authorities lure Mr Zambada onto a private plane to El Paso, under the pretence that he was going to inspect clandestine airfields in northern Mexico. Perhaps it was part of a deal between Mr Gúzman López and American prosecutors that would benefit him or his family. But Mr Zambada may also have been in negotiations to turn himself in; he may have wanted a story to conceal that.