Books by Inge Black

Charles L. Yeschke has been working in the investigation field for more than 30 years. As an FBI special agent, Mr. Yeschke was certified as a polygraphist and conducted hundreds of detection of deception examinations in various federal criminal investigations. He has authored numerous articles and publications on interviewing. Currently, he is the proprietor of Charles Yeschke Associates, a firm providing confidential investigation services, security/loss prevention consulting, and training seminars.