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and groom those boys, the way he abused his role model status to discredit his abusers. after all of that, after all we've come to know, we still don't know this. how when he was literally caught in the act raping a boy in the penn state locker room shower, did he get away with it and go on to rain more boys? well, graduate assistant mike mcqueary saw him and the boy in the shower. he froze, didn't stop sandusky, but he did report what he saw. he told his box the legendary head coach, joe paterno what he saw. coach paterno told his bosses. everyone who had the power to stop jerry san...

on to rain more boys? well, graduate assistant mike mcqueary saw him and the boy in the shower. he froze, didn't stop sandusky, but he did report what he saw. he told his box the legendary head coach, joe paterno what he saw. coach paterno told his bosses. everyone who had the power to stop jerry sandusky had the information they needed to stop jerry sandusky. so why didn't they? that is the question. tonight, a "360" exclusive that could point to some answers. more, now, from susan candiotti. >> reporter: cnn has been given details of four purported e-mail exchanges from sources wit...