Chain of Evidence

Police sergeant Joe "Dart" Dartelli can't even tell at first that the bodies have been murdered. They all look like suicides or accidents--except for a rare chemical in the blood of each. Even more terrifying to Dart is that the victims seem to be related to the long-ago murder of Lucky Zeller, the only man believed to be more brilliant at understanding the art of forensics than Dart himself. Could Zeller be behind the murders?