Assassin

Volume 1
The assassin is first shown at the beginning of the story. He murders George Caldwell before FBI agents Jason Saunders and Cole Bennett are able to ask him questions, which are not revealed at that time. He appears to have been killed by Jason Saunders, who shoots him in the back after trying to escape. He is described in Chapter 1 as a “dark-haired Caucasian, about five foot nine with a cross tattooed on his forearm.”