Retrograde Extrapolation Expert Witnesses
Retrograde extrapolation expert witnesses and consultants listed here may be able to form expert opinions, draft expert witness reports, provide expert witness testimony at deposition and/or trial as or serve as consulting (non-testifying) experts on retrograde extrapolation. The retrograde extrapolation expert witness listings on this page are typically from fields/areas of expertise such as: Forensic Science, Laboratories & Testing, and Toxicology.
Bethany Pridgen, MFS
Alcohol and Drug Chemistry Expert
The DEVAUS Group, LLC
Wilmington, North Carolina
Forensic Science, Toxicology
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Controlled substances, DWI, DUI, retrograde extrapolation, driving while impaired, alcohol, drunk driving, cannabis, THC, marijuana, CBD, hemp, quality assurance, ISO 17025, laboratory management, laboratory accreditation, dram shop, back extrapolation, SFST, DRE
Bethany has worked in the forensic science industry since 2005. She provides expert witness testimony and consultation for criminal and civil matters involving, but not limited to, DUI, seized drugs, cannabis, forensic testing practices, laboratory management, quality assurance standards, and reliability of testing methods.
Early in her career, she had the opportunity to open a new regional forensic science laboratory in southeastern NC. She began an 11 year journey and gained a career’s worth of experience as a laboratory director, quality assurance manager, laboratory scientist, grant writer and manager. She has written and reviewed hundreds of administrative and technical policies, procedures, and training programs, and has analyzed and provided final review of thousands of biological and seized drug samples.
She is a lead and technical assessor for ISO 17025:2017 and performs assessments in the areas of quality management, toxicology, and seized drugs testing for ANAB and A...
Samuel L Kleinman, PhD F-ABFT TC-NRCC
Board Certified Forensic Toxicologist
Cincinnati, Ohio
Forensic Science, Laboratories & Testing
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impaired driving, sexual assault, drugs, alcohol, prescription medicine, overdose, DUI, DWI, OWI, accident, crash, toxicology, forensics, dram shop, testing, insurance, injury, workplace drug testing, retrograde extrapolation, dram shop
Dr Samuel Kleinman is a double board certified forensic toxicologist; he is a Fellow of the American Board of Forensic Toxicology and a Toxicological Chemist certified by the National Registry of Certified Chemists. Dr Kleinman served as both the Deputy Bureau Chief and the Bureau Chief for the central forensic toxicology lab for the state of New Mexico. In this role he participated in more than 40 trials including state district court as well as federal court in New Mexico. He is an expert in laboratory accreditation and piloted the transition of the New Mexico lab towards ISO 17025 compliance.
Dr Kleinman has expertise in pharmacology, pharmacokinetics, impaired driving, sexual assault and blood alcohol interpretation. He offers consultation and education on interpreting laboratory results, chain of custody, workplace drug testing; and if appropriate, participates in depositions and trials. Dr Kleinman is based in Cincinnati, Ohio but consults nationwide.
