And of course, soon afterwards, he “escaped”. That tunnel was there the entire time. He was coming & going as he pleased, with paid off guards looking out for him.
Or—and this is a conspiracy theory—El Chapo didn't really escape. He was moved in the dead of night to another location by the government and the whole jail break is theater. Some of the Mexican authorities may have worried El Chapo might implicate some powerful officials if he stood trial in the U.S.