Publisher's Synopsis
This book is intended to be used as a reference book primarily, but I have also included some actual cases that I have been involved with. I had 25 years of experience in law enforcement and security. I am now retired, but occasionally get requests from agencies to consult, and sometimes install covert equipment. Mostly, I try to help mystery writers with the technical aspects of covert surveillance. The equipment is changing daily, but most of the techniques still apply.
