He is still a convicted murderer.
He can not completely undo the gang mentality he started as a lifestyle for so many.
When prisoners change personality wise, they frequently make themselves look better, not worse, for clemency or parole reasons. Many revert when released from prison.
Back in the 70s far left writer Normal Mailer launched a similar campaign to have murderer Jack Abbott released from prison. Once free, Abbott showed his gratitude and proved the "wisdom" of Mailer's self-righteousness by reverting to type and knifing a New York City waiter to death.