Unincarcerated writers, artists and musicians are sometimes invited to mentor writers, artists or musicians who are detained, when the detained artist requests this.  One very public mentoring relationship was that of Firstdog Onthemoon and Eaten Fish.  See ‘The Apocalyptic Incarceration of Eaten Fish’ in First Dog on the Moon’s latest book ‘Guide To Living Through the Impending Apocalypse’ , HarperCollins, 2017, for his take on this process.  Eaten Fish is preparing a cartoon on this subject from his new home in Norway!