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 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”. His career includes NASA Security, owner/operator of a large security company, and senior security management positions with grocery and retail “big box” operations. Curtis is a member of the International Association of Professional Security Consultants (IAPSC).