The deputy, a 51-year-old woman just 5 feet tall, was simply no match for the inmate she was escorting to the courtroom, a 6-foot-1, 200-pound former college linebacker on trial for rape. Authorities say Brian Nichols overpowered deputy Cynthia Hall, took her gun, and easily gained access to the courtroom, where he went on to kill the judge and a court reporter. Security cameras captured images of him overpowering the deputy, but no one, it turned out, was watching the screens. There were more security gaffes. Prosecutors actually had asked for increased security surrounding Nichols last week after he was...