Marc A. LeBeau, PhD, is a Senior Forensic Scientist of the Scientific Analysis Section at the FBI Laboratory. He has worked as a Forensic Chemist and Toxicologist for the FBI since 1994 and has testified in federal, state, and county courts throughout the United States. Separately, he is President of LeBeau Forensic Toxicology Consulting, LLC. 

Dr. LeBeau holds a bachelor’s degree in Chemistry and Criminal Justice from Central Missouri State University (1988) and a Master of Science degree in Forensic Science from the University of New Haven (1990). He was employed in the St. Louis County Medical Examiner’s Office (1990-1994), before beginning his career with the FBI. In 2005, he received his Doctorate in Toxicology from the University of Maryland – Baltimore. 

As a Fellow of the American Board of Forensic Toxicology, Dr. LeBeau is active in numerous scientific organizations. He serves as the immediate Past-President of The International Association of Forensic Toxicologists (TIAFT) and is a Fellow of the American Academy of Forensic Sciences (AAFS). Additionally, Dr. LeBeau is a member and Past-President of the Society of Forensic Toxicologists (SOFT). 

Dr. LeBeau has spent much of his career helping to advance the forensic sciences. He has served as a Commissioner on the National Commission on Forensic Science, the chairman of the Scientific Working Group on the Forensic Analysis of Chemical Terrorism (SWGFACT), and co-chair to the Scientific Working Group on the Forensic Analysis on Chemical, Biological, Radiological, and Nuclear Terrorism (SWGCBRN). He was also a co-chair of the Scientific Working Group for Forensic Toxicology (SWGTOX). He was the first Chair for the Toxicology Subcommittee of the Organization of Scientific Area Committees (OSAC). Currently he is the Chair of the OSAC’s Chemistry SAC for Seized Drugs and Toxicology. He also is the Chair of the AAFS Standards Board’s Toxicology Consensus Body. 

In 2004 and 2020, Dr. LeBeau won the FBI Director’s Award for Outstanding Scientific Advancement, the 2008 End Violence Against Women (EVAW) International Visionary Award, and the Alexander O. Gettler Award from the Toxicology Section of the American Academy of Forensic Sciences in 2015.