It was the best of times, it was the worst of times . .. . So might one describe the contrasting portraits of DNA\u27s ascension in the criminal justice system that are drawn in David Kaye\u27s The Double Helix and the Law of Evidence and Sheldon Krimsky and Tania Simoncelli\u27s Genetic Justice: DNA Data Banks, Criminal Investigations, and Civil Liberties. For Kaye, the double helix stands as the icon of twenty-first-century achievement, a science menaced primarily by the dolts (lawyers, judges, and the occasional analyst) who misuse it. For Krimsky and Simoncelli, DNA is a seductive forensic tool that is prone to overuse and best distrusted, as evidenced by swollen national data banks, shady police and laboratory practices, and unverified...