What's astounding is that a little over a year earlier, one of his lieutenants escaped from prison using almost identical means: by building a tunnel from a ground-floor cell to the outside world.

The prison's layout ensures that inmates never interact ... but by the echo of footsteps in sterile hallways. Though his prison cell is unbreakable, the stories of El Chapo's past escapes continue ...

"The stories about the shot-calling prison gang leaders grab the headlines, but that’s not the average incarcerated person who has a cell phone." Even if jammers were used in limited areas ...