Folksy rocker sings about injustice as part of recording session for new album. *The heartland rocker that brought us "Jack and Diane" and "Pink Houses" in the 80s has focused his creative attention toward Jena, Louisiana for a song on his upcoming album. According to Fox411 columnist Roger Friedman, John Mellencamp has recorded a song about the Jena 6, the group of six African American teens who were charged in the beating of a white classmate by a district attorney largely viewed to be racially biased. Listen to the song here: http://relative-way.com/jenastream. The lyrics are as follows: "An all-white jury...