title: The silent witness: A polygraphist's casebook
author:  Chris Gugas 
description: A fascinating casebook, Chris Gugas, the author, reveals the answers to questions about famous and other cases where the lie detector was used. He explains what the polygraph is, how the examiner goes about his job and what the machine can and cannot do. Also, how the test can clear the innocent and discover the guilty in the hands of a skilled examiner.
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  [Acknowledgments](../Text/Contents.xhtml#ack)
  
  
  
  
  
  It should be obvious by now that this book is the work of many people, not
  just one or two. I am indebted to so many and would like to thank everyone who
  has offered insights and put their thumbprint on this work.
  
  
  
  
  
  The first group is perhaps the least obvious and the most essential: the
  nominators—the original people we interviewed, who told us of their
  experiences working with the Multipliers and Diminishers throughout their
  careers, and the dozens of people who shared their experiences and strategies
  for dealing with diminishing bosses. The witness protection program requires
  that I don’t list their names, but they know who they are. This book exists
  because they have shared their experiences and insights. Of course, there are
  the Multipliers who allowed us to study them and who have shared their
  stories, and appendix C, “The Multipliers,” lists these. These leaders, and
  the other rock stars whose stories I couldn’t fit into t