One minute Joaquín "El Chapo" Guzmán was locked up in Mexico's secure prison. The next, he was gone.Guzmán, the infamous leader of the Sinaloa drug cartel, pulled off his elaborate escape from the Altiplano maximum security prison will a casual cool, as seen in new footage released by the Mexican government Tuesday.CCTV footage from inside the prison shows the final moments Guzmán, spent inside his cell on Saturday evening, before pulling off his epic escape from behind bars. He is seen simply walking behind a low wall in the shower and toilet area, and then he is gone.Another clip taken in the prison after authorities realized Guzmán was gone shows the small square hole cut into the shower floor.The footage was released by Mexico’s national security commissioner, Monte Alejandro Rubido, on Tuesday, as he detailed what investigators know so far about Guzmán elaborate escape.