During the release of the Japanese Sega Saturn version of the original game, Capcom published a promotional sourcebook "The True Story Behind Biohazard", containing an original short story titled "Biohazard: The Beginning" by Hiroyuku Ariga. It depicts the events before the first game and fleshes out Chris' character, describing the deaths of his parents in a car accident, and his service in the United States Air Force (USAF). Chris joined the USAF as a teenager, quickly becoming an accomplished pilot as well as a top marksman, but received a dishonourable discharge in the mid-90s for disobeying a direct order. He later became a drifter until enlisting (on Burton’s recommendation) in the newly established Raccoon City branch of the STARS. Chris also appears in several "Resident Evil" comic books by WildStorm, Image Comics and Marvel Comics.