David sweat and why she did not live up to her role in the final escape. >> there's a line, and when the line is stepped over, then action has to be taken. >> reporter: it allegedly started months ago with mitchell bringing things to sweat and matt. in december, it was eyeglasses with headlights and batteries. eventually, it would be tools like hacksaw blades, chisels, a punch, and a screwdriver bit. she also agreed to be the getaway driver. mitchell was supposed to meet the escapees at the powerhouse near the prison, then drive seven hours away. she wasn't told the exact location, just that i...