Mark's story proves a point I have long held about criminals. Those that are a danger to others should be separated from society until they no longer pose a risk to others, and should be rehabilitated (not just isolated). Anyone else should be free. For example a guy who kills his wife in a jealous rage is unlikely to go and murder you or I, and therefore if he poses no threat to the general public, I don't agree with locking him up in a cell. A prison should be a place only for those who are unable to contribute anything productive to society, and at the same time pose no risk to the public. Mark has shown that even if you do a really bad thing, even the most "unforgivable" thing, you can still go on and do good things with your life. How many other of our prisoners are prevented from being productive, successful individuals?