"‘Jack the Knife.' That's what the media started calling him. ‘The Six-Shooter Killer.' As unforgiving, deadly, and cold as a blade. And how cold. How cold a man would have to be, to do something like this to a fellow human being. How cold... to do it to his own wife."

It's twelve years in the past, and the district attorney's voice has the measured and practiced tone of a stage actor. He turns from the jury. He presses a button. A picture appears onscreen. The air in the courtroom ...