by Joseph Perry (Author)

The polygraph process techniques and strategies in each step of this book will reinforce your abilities to obtain a confession in the areas of criminal investigation and pre-employment screening and a better understanding of polygraph. In today's world where the criminal has evolved in an alarming way, it is our responsibility to step up your skills, better training and refine your skills. This book is unique and it will give the tools that will inspire and motivate you.This book is not only to educate professionals in the science of polygraph but also investigators, criminologists, psychologists, etc.