Who is Assistant Warden Spivey from Killing Floor and what is their importance?

Assistant Warden Spivey is a heavy man with a high-pitched voice. He has small eyes and a wide neck with reddened skin that is overly fleshy. He has large farmer's hands and a big hard stomach. Part of the conspiracy, Spivey first places Hubble and Reacher in with the long-term offenders. When an attack on them fails, and Reacher manages to keep himself and Hubble alive, Spivey 'rescues' them and takes them to the large holding cell they were supposed to be in to begin with.