This screen grab of video from a security camera, dated July 11 and released by Mexico's National Security Commission, shows the man Mexican authorities say is Guzman inside his cell at the Altiplano maximum security prison, looking at the shower floor shortly before escaping through a tunnel below. AP hide caption

itoggle caption AP

In 2013, residents of some towns in western Mexico took up arms in an effort to defend their villages against drug gangs. Marco Ugarte/AP hide caption

itoggle caption Marco Ugarte/AP

A motorcycle adapted to a rail sits in the tunnel under the house where, according to authorities, drug lord Joaquín "El Chapo" Guzmán made his escape from the Altiplano maximum-security prison. Eduardo Verdugo/AP hide caption

itoggle caption Eduardo Verdugo/AP

A federal police Black Hawk helicopter flies over a house at the end of a tunnel through which drug lord Joaquin "El Chapo" Guzman could have escaped from Mexico's Altiplano prison. Yuri Cortez /AFP/Getty Images hide caption

itoggle caption Yuri Cortez /AFP/Getty Images

Joaquin "El Chapo" Guzman is escorted to a helicopter in handcuffs by Mexican navy marines at a navy hanger in Mexico City after his capture last year. Mexico's security now say Guzman has escaped from a maximum security prison for the second time. Eduardo Verdugo/AP hide caption

itoggle caption Eduardo Verdugo/AP

Reproduction of a letter to the National Commission of Human Rights from criminals, drug dealers, murderers and kidnappers in "El Altiplano," Mexico's highest-security prison. Ronaldo Schemidt/AFP/Getty Images hide caption

itoggle caption Ronaldo Schemidt/AFP/Getty Images

On Thursday, the Mexican Navy presented Felix Beltran Leon (in red) as the son of Joaquin "El Chapo" Guzman, Jesus Alfredo Guzman Salazar. On Friday, Mexican and U.S. officials confirmed that Beltran's identity had been mistaken. Alfredo Estrella /AFP/Getty Images hide caption

itoggle caption Alfredo Estrella /AFP/Getty Images