ROBERT C. KOEHLER – “. . . I write today from a position rare for a former prosecutor: to beseech you to commute the sentence of a man I helped put behind bars.” Thus begins one of the most stunning letters Robert Koehler has ever read, written almost four years ago by former U.S. Attorney James H. Reynolds to President Joe Biden, pleading with him to exonerate former American Indian Movement (AIM) leader Leonard Peltier