David Gilbert went to prison a revolutionary, raising his fist and scorning authorities who prosecuted him for an infamous 1981 armored truck robbery in which a guard and two police officers were killed. Four decades later, advocates for the 76-year-old inmate’s release include San Francisco’s chief prosecutor, the son left behind at 14 months old when both his parents were arrested. “As long as I can remember, I’ve known that the most likely scenario is that my father is going to die in prison,” said Chesa Boudin, sworn in as district attorney last year. Boudin ran a progressive campaign in which he said visiting his parents Kathy Boudin and Gilbert in prison showed him the criminal justice system was broken.