K. Mathews was an Umbrella employee undergoing department leader training at the Umbrella facility in the Arklay Mountains, which closed down in 1978. Matthews was abducted by the facility's head, Dr. James Marcus, for use in his early human trials with the Progenitor virus. After the experiment in which Matthews was soon after killed (whether from the experiment or Marcus is not disambiguated), the corpse was later disposed of in a water treatment plant in the outskirts of Raccoon City.