so they went back to the prison and pulled it off the next night using a different manhole. sweat also confirms the escapees hadn't used power tools after all, just hacksaw blades wrapped in cloth to make them easier to use, to cut through the steam pipe and cell wall. but he adds, they did use a sledgehammer they had found underground to knock down a brick wall on the way out. an impressive jail break that the one surviving escapee will be able to think about behind bars, authorities hope, for many more years to come.