good morning to you. i'm pamela brown in for carol costello. thank you so much for being here with us. this morning convicted killer david sweat is upgraded from critical condition, and investigators say he's revealing crucial details of the prison escape. the intricate planning and the scramble to improvise. prison employee joyce mitchell was plan a, but when she didn't show up with the getaway car, sweat and richard matt abandoned their plans to flee to mexico. with no plan b, they headed toward canada on foot instead. and sweat is sure to face questions about a possible heroin ring operating inside the prison. investigators believe there may have been a criminal network, inmates partnering with corrupt prison workers. cnn's deborah feyerick has been covering the story extensively. deb, tell me why should investigators believe anything david sweat says? i mean, he is a hardened