Derek was a terran who lived on Tarsonis, employed as a servant by the Terra Family. It was a position that got him killed, for during the Great War, a group of rebels infiltrated the Terra Skyscraper, intent on murdering the family. Derek was not killed by the rebels however, but rather as a result of November Terra unleashing her telekinesis in a massive psychic attack.
References[]
DeCandido, Keith R. A. (November 28, 2006). StarCraft: Ghost: Nova. Simon & Schuster (Pocket Star). ISBN 0-7434-7134-2