FILE - Federal Police officer stands in the tunnel where drug lord Joaquin "El Chapo" Guzman made his escape from the Altiplano maximum security prison in Almoloya, west of Mexico City, July 16, 2015.
Newly released video reveals more details, including sounds, of the infamous escape of Joaquin "El Chapo" Guzman.
In the video, hammering sounds can be heard minutes before the leader of the Sinaloa drug cartels disappeared into a tunnel in July.
Before making his escape, Guzman is seen watching TV while lying in bed. Shortly after, hammering can be heard.
WATCH: New video shows 'El Chapo' escape
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Prison guards also are seen doing nothing for up to 25 minutes after Guzman walked into the shower and escaped.
It took almost 30 minutes before guards appeared at Guzman’s cell.
In 2001, Guzman escaped the Puente Grande jail by reportedly hiding in dirty laundry.