Advocates are seeking clemency for one of the last people still imprisoned in a fatal 1981 Brink’s armored truck robbery. People hoping for 76-year-old David Gilbert’s release include his son, San Francisco’s chief prosecutor Chesa Boudin. The infamous armored truck robbery north of New York City left a guard and two police officers dead. Gilbert was the unarmed getaway driver and is serving a 75-year-to-life sentence. His son described him as remorseful. The robbery still stirs emotions, especially among local officials and relatives of the slain men who have watched with exasperation others convicted in the crime walk out of prison.