The star/victim of "Robin Hood of the Sierras" is Joaquin Murrieta, "bandit"/national hero/corrido-fodder from California history. More on Murrieta here.
An added treat for followers of the #bizarrecaucasianbestiary hashtag on blogger, tumblr, instagram, and facebook? None other than "Sandy" the self-wetting rubber doll! Ack!
For more info on Murrieta, California history, and other alleged "rogues" of the Western era, look up Revolvers and Pistolas, Vaqueros and Caballeros: Debunking the Old West (Intersections of Race, Ethnicity, and Culture) by Cuban cultural critic and librarian Danilo H. Figueredo.
Comic scan source? The awesome Digital Comics Museum!