Theory of crime

Theory of crime http://www.latimes.com/news/local/la-me-execution13dec13,0,799154.story?page=3 above read the article on Stanley Tookie Williams  in the link .  One criticism of the General Theory of Crime is that people actually do change over their lifetime.  Mr. Williams was a cofounder of the Crips gang who was noted with changing his behavior while in prison.  He was nominated for the Nobel Peace Prize.  In two paragraphs please answer the following questions: Do you believe that a gang leader such as Mr. Williams can really change?  Or did his changing life circumstance prevent him from committing violent criminal acts?