Charles A. Sennewald Independent security management consultant, expert witness, and author, internationally based Charles "Chuck" Sennewald CSC, CPP, is an independent security management consultant and expert witness and the author of numerous Butterworth-Heinemann titles, including "Effective Security Management"; "Security Consulting"; "Retail Crime, Security and Loss Prevention: An Encyclopedic Reference;" "From the Files of a Security Expert Witness"; and earlier editions of this book "The Process of Investigation." Chuck is a graduate of California State University - Los Angeles with a BS degree in Police Science and Administration. Chuck is also the founder and first president of the International Association of Professional Security Consultants (IAPSC), and is a long-time member of ASIS International. He has lectured and is read in countries around the globe. Curtis Baillie President, Security Consulting Strategies, West Chester, PA, USA Curtis Baillie CSC, is an independent security management consultant and a retail security expert witness who contributed to the Butterworth-Heinemann titles, "Retail Crime, Security and Loss Prevention" An Encyclopedic Reference" and Security Consulting. Curtis's career includes NASA Security, Owner/Operator of a large security company and senior management positions with grocery and retail "big box" operations. Curtis is a member of the International Association of Professional Security Consultants (IAPSC) and is a member of ASIS International.