William Jerry Chisum has been a criminalist since 1960. He studied under Dr. Paul L. Kirk at U.C. Berkeley, worked in San Bernardino, and set up the Kern County Laboratory in Bakersfield. After joining the California Dept. of Justice, he took a leave of absence (1971-73) to work at Stanford Research Institute. He has been President of the California Association of Criminalists three times, and has also served as President of the American Society of Crime Lab Directors. In October of 1998, he retired from 37 years of public service but continues working as a private consultant. An accomplished teacher and lecturer, he has also been published in many forensic science journals and books.Brent Turvey, PhD is the author of Criminal Profiling: An Introduction to Behavioral Evidence Analysis, 1st, 2nd, 3rd and 4th Editions (1999, 2002, 2008, 2011); co- author of the Rape Investigation Handbook, 1st and 2nd Editions (2004, 2011), Crime Reconstruction 1st and 2nd Editions (2006, 2011), Forensic Victimology (2008) and Forensic Fraud (2013) - all with Elsevier Science. He hold an MS in Forensic Science and a PhD in Criminology. He is a full partner, Forensic Scientist, Criminal Profiler, and Instructor with Forensic Solutions, LLC, and The Forensic Criminology Institute.Dr. Turvey also maintains a caseload of femicides (e.g., sexual homicides, gender motivated homicides), pre-femicidal violence, trafficking, and human rights cases in Latin America. Many of these are related to drug trafficking and human trafficking. This involves the implementation of the UN Model Protocol for Femicide Investigation in Latin America, with The Forensic Criminology Institute's Behavioral Science Lab (BSL). In operation since 2019, the BSL collaborates with USAID, The United Nations, and The Attorney Generals Office in Bogota DC, providing international support and training to attorneys , investigators and forensic professionals.