About us
Training and resources on drug impairment are often scattered, costly, or out of reach for those who need them most. Our mission is to connect practitioners from all disciplines with credible resources from top experts on a single, easily accessible platform.
How we work
DrugImpairment.com is where experts in drug recognition, forensic and clinical toxicology, medicine, vision science, and other fields come together to offer training on the complex topic of drug impairment. Our multidisciplinary approach and our inclusion of instructors with real-world experience is unmatched.
Industry-leading training is rarely next door. Travel time, class and conference schedules, and often exorbitant travel costs limit who can attend. We deliver the training you need as asynchronous e-learning courses you can take when and where it is convenient for you.
The classic continuing education model means paying hundreds of dollars for webinars and thousands of dollars for conferences to reach cutting-edge content. We use a membership-based platform to scale content over time for otherwise impossibly low fees, which gives frontline practitioners broader access.
Instructors
Our instructors are forensic and clinical toxicologists, physicians, pharmacists, vision scientists, prosecutors, researchers, and law enforcement officers. Each one teaches from real-world experience. Select a name to read the full bio.
Institute for Emerging Health Professions, Thomas Jefferson University
Professor Dr. Dr. (h.c.) Marilyn A. Huestis retired as a tenured senior investigator and Chief, Chemistry and Drug Metabolism Section, IRP, National Institute on Drug Abuse, National Institutes of Health in 2016 after…
Director of Forensic Toxicology, Wisconsin State Laboratory of Hygiene, UW School of Medicine and Public Health, National Resource Toxicologist
Amy Miles is the Director of the Forensic Toxicology Program at the Wisconsin State Laboratory of Hygiene (WSLH) and has over 20 years of experience in forensic toxicology. Amy provides expert court testimony and…
System Director, North Louisiana Criminalistics Laboratory
Dr. Jones has dedicated his career to forensic science since 2006, currently serving as System Director at the North Louisiana Criminalistics Laboratory. In this role, he manages the operations of two forensic…
Professor of Optometry, Pacific University College of Optometry
Dr. Citek is a Professor of Optometry at Pacific University College of Optometry in Forest Grove, Oregon. He has taught courses in Ophthalmic Optics, Physiological Optics, Low Vision, Visual Perception, and…
Regional Toxicology Liaison
Chris Heartsill is currently certified by the American Board of Forensic Toxicology as a Diplomate – Forensic Toxicology and received his B.S. degree in Chemistry from East Central University in 1991. Chris has been…
Regional Toxicology Liaison, NHTSA Region 5
Sabra Jones is a board-certified Forensic Toxicologist with a focus on transportation safety. Sabra is the Regional Toxicology Liaison for the National Highway Traffic Safety Administration’s Region 5, serving Illinois…
Assistant Laboratory Director and Toxicology Analysis Unit Supervisor, Kern Regional Crime Laboratory
David Zimmerman received his Master of Science degree in Chemistry from the California State University of Fresno. During his time at CSU Fresno Mr. Zimmerman completed research using Nuclear Magnetic Resonance studying…
NHTSA (Ret.)
Amy was a Research Psychologist with the National Highway Traffic Safety Administration’s Office of Behavioral Safety Research for 35 years. Ms. Berning conducted research on traffic safety issues in many areas, with a…
Traffic Safety Resource Prosecutor
Jennifer Knudsen has been Colorado’s Traffic Safety Resource Prosecutor (TSRP) for the Colorado District Attorneys’ Council since 2014. Her undergraduate degree is from the University of Denver. She then went to the…
Forensic Toxicologist, Ventura County Sheriff's Crime Lab
Nelly Mikhaltsevich is currently a Forensic Scientist III at the Toxicology Section of the Ventura County Sheriff’s Crime Lab, CA. Nelly has worked at the VCSO Crime Lab since 2007. While her duties include anywhere…
Associate Director of Research, The Center for Forensic Science Research & Education
Ms. Amanda (Mandi) LA Mohr serves as an Associate Director at the CFSRE working in the area of forensic toxicology and is the Program Director for the Forensic Sciences Mentoring Institute program. Ms. Mohr is also an…
Senior Forensic Scientist, FBI Laboratory Scientific Analysis Section
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…
Professor, Department of Forensic Science, Affiliate Faculty Member of the Institute of Drug and Alcohol Studies, Affiliate Faculty Member of the Department of Pharmacology and Toxicology, Virginia Commonwealth University
Dr. Peace is a forensic toxicologist and a Full Professor in the FEPAC-accredited Department of Forensic Science at VCU and is one of the founding faculty for the Department. She served as Associate Chair and Chair for…
Crime Laboratory Director
Jennifer is a private forensic toxicology and forensic laboratory consultant, expert witness, quality assurance assessor with both ANAB and A2LA, and the Curriculum Manager for DrugImpairment.com. She currently works as…
Supervisor of Forensic Services
Carrie Kirkton is a Supervisor of Forensic Services in the Toxicology Section of the New York State Police Forensic Investigation Center. She has a BS in Chemistry and a Master of Science degree in Forensic Science. She…
Toxicologist
Darcy Richardson, MS, is a toxicologist and the owner of Vermont Forensic Services, an independent firm offering forensic consulting services for toxicology, DNA and serology cases. Darcy has worked in forensic…
Associate Director/ Toxicology, New York State Police Forensic Investigation Center
Jennifer Limoges, MS, is the Associate Director/Toxicology at the New York State Police Forensic Investigation Center. She received her BS in Chemistry from Clarkson University and her MS in Forensic Science from the…
Police Corporal, Denver Police Department
Aaron Botts has been a dedicated member of the law enforcement community since July 2008. Beginning his career in Wheat Ridge, Colorado, Aaron honed essential skills as a patrol officer in suburban environments, quickly…
Chief Toxicologist
Dr. Curt E. Harper has over 16 years of experience as a Forensic Toxicologist. He was appointed Chief Toxicologist for the Alabama Department of Forensic Sciences (ADFS) in 2012. As Chief Toxicologist, he oversees…
DRE Instructor
Ari Briskman is a career law enforcement officer, having served in various capacities in northern Illinois for almost two decades. Early in his career, Ari became interested in traffic safety. Ari honed his skills by…
Associate Professor and Director of Forensic Toxicology Laboratory, University of Alabama at Birmingham
Dr. Karen Scott is the Director of the Forensic Toxicology Laboratory and an Associate Professor of Laboratory Medicine at the University of Alabama at Birmingham. She has over 30 years of experience in the fields of…
Owner/Lead Instructor and Consultant, Integrated Impaired Driving Solutions LLC
Dave Kopenhaver, native of Williamsport, Pennsylvania has served communities for the past thirty-one years retiring in May of 2022. He began his law enforcement career in 1991 serving six years in the United States…
Traffic Safety Resource Prosecutor for Missouri
Stephanie Watson is an experienced prosecutor specializing in the prosecution of complex impaired driving cases. She currently serves as the Traffic Safety Resource Prosecutor for Missouri, where she provides training…
Sergeant, York County Sheriff's Office
Sgt. Samek is a ten-year veteran to law enforcement and is currently assigned as a night shift supervisor at the York County Sheriff’s Office in York, NE. In conjunction with his supervision duties, Sgt. Samek currently…
Manager, Implied Consent, Georgia Bureau of Investigation, Division of Forensic Sciences
Chris Tilson studied biochemistry at the Georgia Institute of Technology in Atlanta, Georgia where he received a B.S. in chemistry in 1996. He has worked as a forensic toxicologist, toxicology section technical leader…
Toxicology Technical Leader, Houston Forensic Science Center
Dani C. Mata, MSFS, is currently the Toxicology Technical Leader at the Houston Forensic Science Center. Previously, she was a Senior Forensic Scientist in the Forensic Chemistry Bureau of the Orange County Crime Lab…
Forensic Toxicologist, Defense Health Agency, Armed Forces Medical Examiner System, Division of Forensic Toxicology
Dr. Erin L. Karschner received her Ph.D. in Toxicology with a concentration in Forensic and Analytical Toxicology from the University of Maryland-Baltimore. She performed her doctoral and post-doctoral research at the…
President, 9-Delta Analytical
Christine Moore is the former Chief Toxicologist in the Rapid Diagnostics Division of Abbott. There, she directed the laboratory used for testing blood and oral fluid specimens from multiple roadside surveys including…
Toxicology Supervisor at the Houston Forensic Science Center
Dr. Jessica Lynn Ayala is currently a Toxicology Supervisor at the Houston Forensic Science Center. Dr. Ayala has over a decade of toxicology experience working in public and private toxicology laboratories analyzing…
Associate Professor, University of Saint Joseph School of Pharmacy & PA Studies, Department of Pharmacy Practice and Administration
Dr. Laskey is an associate professor at the University of Saint Joseph in West Hartford, CT. He received a PharmD from the University of Connecticut, completed his pharmacy practice residency at Grady Memorial Hospital…
Regional Toxicology Liaison, NHTSA Region 9
Kristen retired from public service in 2022 and worked in the Toxicology field for over 24 years. She is a Toxicology Liaison for the National Highway Traffic Safety Administration Region 9 and supports AZ, CA, HI, and…
Toxicologist III, NMS Laboratories
Donna Papsun is a forensic toxicologist at NMS Labs in Willow Grove, PA. She has dual Bachelor of Science degrees from West Virginia University in Chemistry and Forensic & Investigative Science and a Master of Science…
Chief Toxicologist, Defense Health Agency, Armed Forces Medical Examiner system, Division of Forensic Toxicology
Dr. Walterscheid received his Bachelor of Science degree in Chemistry from the University of Texas at Austin, and his Ph.D. in Immunology from the UT Graduate School of Biomedical Sciences in Houston. He also completed…
Forensic Scientist III, Toxicology, Orange County Crime Lab
Helen Chang is currently a Forensic Scientist III for the Toxicology Section of the Orange County Crime Lab, CA. Helen’s primary focus is on research, method development, validation, and instrumentations. She received…
Clinical Assistant Professor, Division of Medical Toxicology, Department of Emergency Medicine, Jefferson-Einstein Healthcare Network
Dr. Richard Chen is a Clinical Assistant Professor at the Sidney Kimmel Medical College and is a board-certified medical toxicologist and emergency physician. Dr. Chen received his MD degree from the University of…
Lieutenant, Bonneville County Sheriff's Office
Lieutenant Zebulon (Zeb) Graham is a full-time law enforcement officer for one of the four largest sheriff’s offices in the state of Idaho. Lt. Graham has held various law enforcement assignments since 2006 including…
Toxicology Consultant, Tox Expert
Christine Frenette worked for 14 years as an Alcohol and Drug Toxicologist for the Royal Canadian Mounted Police (RCMP) in Canada. She is now a private consultant on toxicology matters through her business “Tox Expert”…
Medical Toxicologist
Dr. Mostafa is a board certified emergency physician currently practicing in the state of New York. He received his medical degree from Cairo University, Egypt, and has completed his residency training in Hamad Medical…
Chief Executive Officer, Associates in Emergency Medical Education, Inc.
Dr. Sharon Kelley is the CEO for the Kelley Consulting Group, Associates for Global Narcotics Training and Associates in Emergency Medical Education. While completing her Bachelors in Pre-Medical Sciences she served as…
Emergency Physician, Drug Recognition Expert
Gerald Beltran, DO, MPH is an Emergency Physician in Greenville, SC. He is the Chief of the Division of Prehospital and Disaster Medicine within the Department of Emergency Medicine at the Prisma Health. He received his…
Drug Recognition Expert Instructor (Ret.), DRE State Coordinator (Ret.)
Don Marose is President and CEO of CD Training Consultants, Inc. CD Training Consultants’ goal is to deliver professional training in the signs and symptoms of alcohol and drug use and abuse and safe driving…
Vestibular Physiotherapist, North 49 Balance & Dizziness Centre
Kregg has been a registered physical therapist since 1995. Over the years his caseload has shifted from solely orthopedic to a mix of orthopedic and vestibular. With this background he has also established a reputation…
Forensic Toxicologist, NMS Labs
Jolene Bierly is a Forensic Toxicologist with NMS Labs in Horsham, PA. As a private independent laboratory, NMS Labs provides certified and licensed clinical and forensic toxicological analysis to law enforcement…
Owner, Primary Consultant, Synthegrity Consulting
Makayla J. Chipka, M.S. is an analytical chemist, laboratory consultant, and regulatory expert with extensive experience in drug of abuse analysis, forensic toxicology applications, and analytical method development…
Highway Safety Specialist (ret.), U.S. Department of Transportation, National Highway Traffic Safety Administration’s Office of Emergency Medical Services
David’s main responsibility at NHTSA was the development and revision of formal Emergency Medical Services clinician education. As a certified FAC-COR 2, he led the implementation of the EMS Education Agenda: A Systems…
Melissa Ostergaard is a public health professional and consultant with expertise in traffic safety and injury prevention. She most recently served as a Highway Safety Specialist at the National Highway Traffic Safety…
Guy Farina is a retired Detective Supervisor and nationally recognized expert in deflection, with a career dedicated to public safety, youth engagement, and substance use prevention. He brings decades of frontline…
Steve Scarborough, B.S., CLPE, is a forensic scientist (retired) with 29 years with the Las Vegas Metro Police Dept. as a CSI and fingerprint comparison expert. After retiring from Metro, Steve conducted forensic…
Owner, Cop Smart LLC
Nate Grimm believes we should leave things better than we found them, whether it’s a campsite, an organization, or the world. He started his policing career in 2012 after serving in the Marine Corps. Nate has worked as…
Founder, DrugImpairment.com
Matt draws upon a unique combination of scientific education and field law enforcement experience to provide informative education on drug impairment. His perspectives integrate practical experience from hands-on…
Forensic Toxicologist, NMS Labs
Amanda D’Orazio is a Forensic Toxicologist at NMS Labs in Horsham, PA. She earned her Bachelor of Science in Chemistry from Arcadia University in 2015 and her Master of Science in Forensic Science from Arcadia…
Laboratory Director, North Louisiana Criminalistics Laboratory
Dr. Amy L. Patton is the Laboratory Director of the North Louisiana Criminalistics Laboratory, where she provides strategic leadership and operational oversight for multiple forensic disciplines serving jurisdictions…
Laboratory Director and Chief Forensic Toxicologist, Axis Forensic Toxicology Laboratory
Laureen J. Marinetti, M.S. Ph.D., F-ABFT, is currently the Laboratory Director and Chief Forensic Toxicologist at Axis Forensic Toxicology Laboratory in Indianapolis, Indiana. Dr. Marinetti has over 30 years of…
Expert Insights
These researchers, practitioners and podcasters write and record our free Expert Insights articles and podcasts. Select a name to read the full bio or open their Insights.
Dr. David M. Lehmann is an accomplished toxicologist with nearly 20 years of cross-sector experience across academia, industry, and government, applying toxicology principles to questions involving drugs, alcohol, and…
Clinical Scientist
Rebecca Wood, MSc, DipRCPath, is a Clinical Scientist working in toxicology across both clinical and post-mortem settings. Since beginning her career in toxicology in September 2023, she has been involved in the…
12 Expert Insights episodes
Advisory board
Our Drug Resource Guides are one of DrugImpairment.com's most popular features. Compiling the vast amount of information they require, and making sure it meets the highest degree of quality assurance, takes a team of dedicated, highly skilled experts. We thank the members of our Drug Resource Advisory Board who make this possible.
One Forensic Pro membership covers every course these instructors teach, with no per-course fees.
