In 1975, when he was 19 years old, Marvin Mutch was convicted of murder. He didn’t leave prison until 41 years later. It took the efforts of students working on a wrongful conviction project and a series of lawyers to finally win his release. A new KQED News documentary, “The Trials of Marvin Mutch,” looks at the circumstantial evidence that landed Mutch behind bars, his life in prison and what his case reveals about the parole system. Co-producers and reporters Adam Grossberg and Alex Emslie join us to talk about the film and what Marvin’s life is like now that he’s free.