During quiet moments, after he has finished lecturing for the day, Dr John Stone has flashbacks. It's not the blood or the sound of the gunshots that haunt him. It's the begging. The way people beg for mercy when they die. Begging him. Begging God.
"It's so painful," he says, shaking his head with a shudder. "The families of the dead, they will curse you. A curse will be upon your life."