Leader of the "Mexicles" escapes in assault on Ciudad Juárez jail, who are these criminals?

In an armed assault on a movie in a prison in Ciudad Juárez, Chihuahua, there was a massive escape.

At least 30 prisoners escaped, including Ernesto Piñón de la Cruz, alias "El Neto," leader of the criminal group known as the "Mexicles."

Who are they and how do they operate?

We explain it to you.