CNN At This Hour With Berman and Bolduan August 25, 2015 15:58:00
>> coming to the end of e block. >> reporter: we're not showing the investigators' faces but their point of view is eye opening. they begin at the spot where matt and sweat cut holes in their cells. then follow the same six-story high cat walk before jumping down to take on an elaborate made of pipes and the prison's tunnel system. >> approaching the first significantly tight squeeze, the end of b-block leading into the c-block area. >> reporter: about halfway through the tape -- >> apparently nine, almost ten minutes in. >> reporter: our first glimpse of the hole that takes them from one pris...
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