As they read further, the agents got a sharper look into not just Keyes, but how out of their depth they were. Upon first reading John Douglas’s Mindhunter, Keyes told them, he felt like he was reading about himself. “Put yourself in the position of the hunter,” Douglas wrote. “That’s what I have to do.” Douglas drew a parallel to Payne’s metaphor, Keyes as ambush predator. “If you could get a galvanic skin response reading on one of them as he focuses on his potential victim,” Douglas wrote, “I think you’d get the same reaction as from [a] lion in the wilderness.”
