Theresa JachWith a PhD in US history, Prof. Theresa R. Jach has done extensive research and writing on Texas prisons. Mining the vast collection of photographs from the Texas Prison Museum in Huntsville, the Texas State Archives and Libraries, the Thomason Room rchives at Sam Houston State University, and the Texas Department of Criminal Justice, Professor Jach has gathered a collection of images that tells the story of the Walls Unit and its employees, families, and prisoners. Jim Willett, the director of the Texas Prison Museum, served as warden at the Walls Unit at the time of his retirement. He worked for the Texas Department of Criminal Justice for 30 years. Read More Read Less