Criminal Shadows : Unlocking the Minds of Serial Killers and Sexual Predators-and Cracking Cases

What does a criminal reveal about himself by the way he commits a crime? A criminal may divulge what shoes he wore from his footprints. His blood type can be determined by any body fluids left at the scene. But he leaves more at the crime scene than these material traces. He also leaves psychological traces, telltale patterns of behavior that indicated the sort of person he is. These traces are more ambiguous and subtle than those examined by the biologist or physicist... They are more like shadows... Yet if they can be interpreted, criminals' shadows can indicate where investigators should look and what sort of a person they should look for.