From writer/director Laure de Clermont-Tonnerre and executive producer Robert Redford, the drama The Mustang tells the story of convict Roman Coleman (Matthias Schoenaerts), a man struggling to come to terms with his violent past. While locked up in a rural Nevada prison, he is required to participate in a state-mandated social rehabilitation program that pairs inmates with wild horses for training, in the hopes that maybe he’ll also be able to rediscovery his own humanity. During this 1-on-1 phone interview with Collider, actor Jason Mitchell (who plays Henry, a fellow inmate and experienced horse …