were the cockroaches. do the inmates think that's the issue? >> this is investigators who have suggested that there was nobody patrolling those cell blocks between the hours of say midnight and 5:00 in the morning when they have their first count. investigators believe not just inmates that this allowed mr. sweat i think primarily they think now to spend hours night after night for a number of months even going into the cat walks and boring into the tunnels looking for a way out and eventually found this steam pipe that led to his escape. it is unclear at this point at what point matt and sweat carved the holes in the back of their cells. that obviously would have caused a fair bit of noise. they apparently used hacksaws to do so.