Bio: Friend of John Constantine. Expert computer hacker who uses magic in conjunction with his computer skills. Something Constantine probably can't do. Died while hacking the security network for the Tongues of Fire, a splinter group of the Resurrection Crusaders.
His consciousness was taken into the computer network (implicitly his personal Hell), having been hooked up at the time, and Constantine calls upon him from time to time, Simpson always demanding to be set free.