Six massive murals span hundreds of feet across the walls of a San Quentin chow hall, depicting the history of California in epic scale and detail. Residents of San Quentin eat their meals surrounded by this artwork, and thousands of people see it every year. The murals have inspired countless myths and mysteries, but for a long time, little was known about the artist who painted them. In this episode, we go in search of Alfredo Santos. As always, big thanks to Lt. Sam Robinson and Warden Ron Broomfield for their support of the show. Ear Hustle is a proud member of Radiotopia, from PRX. Find a full list of episode credits at earhustlesq.com.