CNN Anderson Cooper 360 July 21, 2015 03:34:00
>> reporter: fascinating stuff. the new york times is reporting david sweat wander around the tunnels night after night beginning this winter. he would leave his cell every night on the hunt for the skpap route confident the guards wouldn't miss him because as you said they were sleeping. he would disappear between the hours of 11:30 p.m. and be back by 5:00 in the morning. he somehow rigged a fan underground to cool himself reportedly using electricity anderson from the tunnel's lights. >> and there is also new information about when david sweat actually got serious about escaping. >> reporte...