(Covers information from the S.D. Perry novels)
William found work with the Umbrella Corporation when he was barely out of his teens, soon becoming the head of his own laboratory. Umbrella assigned him to work with Dr. James Trenton Darius in his viral research to take notes. Umbrella intended to have James and his wife killed and for William to continue the project, seeing the couple as too ethically-driven to turn it into a military weapon.