Calvin Duncan and Sophie Cull co-wrote “The Jailhouse Lawyer,” about Duncan’s self-taught legal career while serving a prison sentence for a crime he was wrongfully convicted of committing.

While incarcerated at the Louisiana State Penitentiary, Duncan would help hundreds of prisoners file appeals for their cases and motions for improved treatment.

While incarcerated at the Louisiana State Penitentiary, Duncan would help hundreds of prisoners file appeals for their cases and motions for improved treatment.