When William A. Noguera entered San Quentin's death row in the 1980s, he never imagined that decades later, he would be at the center of a story that could shake the American criminal justice system to its core. A convicted murderer himself, Noguera spent more than 30 years behind bars, ultimately becoming an artist, writer, and advocate for justice reform. But it’s what he did in the shadows of San Quentin that may define his legacy.