Roberto Solis was sentenced to life in prison in 1969 for murdering an armored truck driver. He became a successful poet in prison under an alias which led multiple popular writers to petition for his release. He was released and in 1993 he robbed an armored truck for $3 million and is still on the run. – WTF Fun Facts
Source: A fugitive turns herself in after 12 years (nbcnews.com)