In The Shawshank Redemption, Andy conjures up the identity of Randall Stephens as a front for laundering money. He then assumes this identity after escaping from prison. Red comments that the the media reported withdrawals of 'better than $370,000 from each' bank where the laundered money had been deposited. In which case, the media would know that Andy and Randall were technically one, right?
Therefore, is it possible that the United States would pursue extraditing Andy from Mexico?
Also, how could Andy deliver inside information about the Shawshank crimes without incriminating himself?
Could Andy have crafted another identity unrelated to Stephens or his birth name and used this to cross the border?
I can't imagine that Andy could have convincingly faked his death, so I'll let that possibility go.
Andy does say to Red: "Randall Stephens. He's the guilty one, your honour." In context, he's explaining what his defence in court would be if the money laundering was found out. However, Andy's initial conviction was mainly based on "very convenient" events and his lack of remorse, so couldn't a lawyer argue that it was "very convenient" that Randall Stephens could not be found at the cessation of a wild goose chase?