Leonard Peltier, a Native American activist, was wrongfully convicted for the deaths of two FBI agents in 1975, with evidence showing he was targeted without justification. The trial was marred by government misconduct, including the use of false witness statements and the suppression of exonerating evidence, leading to a biased conviction. Despite appeals and widespread calls for clemency from figures like Nelson Mandela and Mother Teresa, Peltier has been denied a new trial and remains imprisoned.