steam pipe, they slipped out of their cells night after night finding a passage way. there they came across a sledgehammer likely left by a construction worker breaking down a brick wall to make their way out. sweat tells investigators the escapees tried one manhole but it was too close to a neighborhood. >> he felt due to there being a number of houses in that area that it might not be a good spot to exit from. >> reporter: the next night, they tried again, finding a more isolated manhole where the escapees were to meet joyce mitchell. sweat says while he was the mastermind it was mitchell's idea for the men to kill her husband before fleeing to mexico. mitchell's attorney says she denies that allegation. when mitchell didn't show up matt and sweat headed towards canada. as the intense manhunt through the woods dragged on sweat says he grew frustrated with matt