A consultant and expert witness in forensic geology, Pye introduces the nature and properties of geological and soil materials that may be used as trace evidence, the techniques that may be used to analyze them, and the ways in which the significance of the results can be evaluated. He writes for law enforcement professionals with little or no science background, and for academic scientists whose only knowledge of law enforcement is from that party back in undergraduate days that got a little out of hand. Annotation ©2007 Book News, Inc., Portland, OR (booknews.com)