ABC News: Investigators, wearing video cameras, retraced the steps of Richard Matt and David Sweat as they escaped from the Clinton Correctional Facility in upstate New York.

Newly revealed video shows the route taken by two men who escaped from an upstate New York prison in June. The video, obtained exclusively by ABC News, features investigators using video cameras, retracing the steps of Richard Matt and David Sweat through a tunnel at Clinton Correctional Facility in Dannemora.

Matt and Sweat squeezed through a catwalk, crossed through underground tunnels, climbed down a ladder and crawled through a pipe, exiting through a manhole outside the prison.

It took the investigators in the video nearly 20 minutes to complete the route used by Matt and Sweat in the escape.

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