Cannabis Expert Witnesses
The SEAK Expert Witness Directory contains a comprehensive list of cannabis expert witnesses who testify, consult and provide litigation support on cannabis and related issues. Cannabis expert witnesses and consultants on this page may form expert opinions, draft expert witness reports, and provide expert witness testimony at deposition and trial. The issues and subjects these cannabis expert witnesses testify regarding may include: Cannabis, Marijuana, Alcohol, Dui, Overdose, Cbd, Drug Testing, Opioids, Economic Damages, Fentanyl, Forensic Toxicology, Impairment, Thc, Bankruptcy, and Carbon Monoxide.
Use the search box above to further refine your search for cannabis expert witnesses by keyword and state. Attorneys contact the experts directly – with no middleman.
Peter John Ingersoll, CCIM
Safe Harbour Equity, Inc.
Oceanside, California
Cannabis, Securities & Investments
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Cannabis, marijuana, banking and financing, receiverships, bankruptcy, FINRA, syndication, 1031 exchanges, investor disputes, securities fraud, breach of contract, breach of fiduciary duty, investor lawsuits, unregistered securities, investor fraud, shareholder disputes, governance, compliance
Cannabis real estate and investment thought leader.
Managing director and cannabis product chair for Sperry Commercial Global Affiliates, the first national real estate firm to embrace cannabis as legitimate investment sector.
Expertise in cannabis including breach of contract issues, breach of fiduciary duty, financing & private equity, governance documents, 1031 exchanges, sale-leasebacks, broken development deals, partner disputes, receiverships (bankruptcy is not available for cannabis enterprises), investor disputes, and unregistered securities litigation.
Former Series 65 registered investment advisor.
Graduate of Wharton School – University of Pennsylvania - BS of Economics.
Co-Captain of the wrestling team
Michael J Kosnett, MD, MPH, FACMT
California
Toxicology, Occupational Medicine
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Lead poisoning, cannabis, drug testing, alcohol, marijuana, environmental toxicology, occupational toxicology, arsenic poisoning, forensic toxicology, DUI, risk assessment, aviation toxicology, medical monitoring
2016 Recipient of the American College of Medical Toxicology Matthew J. Ellenhorn Award [career achievement award in recognition
of “extraordinary contributions to the field of medical
toxicology”]
Diplomate, American Boards of Internal Medicine, Preventive Medicine (Occupational Medicine), and Medical Toxicology
Active Medical Licensure in Colorado and California
Professional activities have included:
• Past President, American College of Medical Toxicology
• Committee on Toxicology of the National Academy of Sciences
• NIOSH Board of Scientific Counselors
• CDC Advisory Committee on Childhood Lead Poisoning Prevention
• EPA Science Advisory Board panels (lead in air, water, dust)
• ATSDR expert panels (lead biomonitoring, hair analysis)
• WHO consultant and temporary advisor (arsenic in drinking water, chelation of heavy metals)
• Consultant to US Air Force Science Advisory Board (F-22)
• Consultant to the US Navy Naval Air Systems Command (F-18)
• US Army Public Health Command (c...
Mario F. San Bartolome, MD, MBA, MRO, FASAM
Arete Health
Roseville, California
Addiction Medicine, Family Medicine
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Opioids, opiate, methamphetamine, overdose, alcohol, hallucinogens, cocaine, cannabis, club, drugs, illicit, drug rehabilitation, utilization management, drug policy, alcohol and drug treatment, drug intoxication, drug withdrawal, detoxification, drug testing appropriateness, pain
Dr. San Bartolome is board certified in addiction medicine and family medicine. He has extensive experience as a medical director at all levels of care in addiction treatment including detoxification. As a medical director, Dr. San Bartolome has been involved in policy making, setting protocols, utilization management and direct patient care in addiction medicine. Due to the nature of addiction, Dr. San Bartolome is experienced in pain management, mental health and use of psychotropic medications, and in other co-morbidities involving addiction. Dr. San Bartolome is a national expert, serving on committees for the American Society of Addiction Medicine and on the board of the California Society of Addiction Medicine. His experience in addiction medicine spans settings like hospitals, psychiatric units, emergency departments, outpatient clinics and as an administrative medical director of substance use disorders for a large health plan. In all of these settings and at various medical...
Michael J Kosnett, MD, MPH, FACMT
Denver, Colorado
Toxicology, Occupational Medicine
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Lead poisoning, cannabis, drug testing, alcohol, marijuana, environmental toxicology, occupational toxicology, arsenic poisoning, forensic toxicology, DUI, risk assessment, aviation toxicology, medical monitoring
2016 Recipient of the American College of Medical Toxicology Matthew J. Ellenhorn Award [career achievement award in recognition
of “extraordinary contributions to the field of medical
toxicology”]
Diplomate, American Boards of Internal Medicine, Preventive Medicine (Occupational Medicine), and Medical Toxicology
Active Medical Licensure in Colorado and California
Professional activities have included:
• Past President, American College of Medical Toxicology
• Committee on Toxicology of the National Academy of Sciences
• NIOSH Board of Scientific Counselors
• CDC Advisory Committee on Childhood Lead Poisoning Prevention
• EPA Science Advisory Board panels (lead in air, water, dust)
• ATSDR expert panels (lead biomonitoring, hair analysis)
• WHO consultant and temporary advisor (arsenic in drinking water, chelation of heavy metals)
• Consultant to US Air Force Science Advisory Board (F-22)
• Consultant to the US Navy Naval Air Systems Command (F-18)
• US Army Public Health Command (c...
Theodore Menadier, MBA
The Business and Cultivation of Marijuana/Hemp
Approach One LLC
Denver, Colorado
Cannabis, Agriculture
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Hemp Cultivation, Feminized Seed, Marijuana Cultivation, Clones, Seedlings, Crop Projections, Crop Valuation, Indoor Cultivation Equipment, Outdoor Cultivation, CBD, Cannabis, Economic damages
I have been retained and provided expert services in over 30 cases and insurance claims over the last 3 years. I have experience in providing opinions in both State and Federal Court. I have experience testifying at both depositions and trials.
My mix of industry experience and business education (MBA) make me uniquely qualified to address many types of issues within Marijuana and Hemp industries. My business education allows me to be able to analyze markets, a business’ strengths and weaknesses, and assess economic impacts in a clearly communicated manner supported by relevant industry, market data, and other relevant documentation.
In addition to continuing expert witness case work, I maintain my relationships throughout the cannabis industry and maintain credentials to work within the industry to be able to stay up to date as the industry evolves.
My experience in indoor and outdoor cannabis cultivation, and business practices gives me first hand knowledge of industry pra...
Shawn F Wurtsmith, MBA, PSP
Expert-Premises Liability and Security Negligence
ICIP LLC
Elizabeth, Colorado
Security, Premises Liability
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Cannabis, Marijuana, Crime Foreseeability, Risk Management, Security Breaches, Inadequate/Negligent Security, Perimeter Security, Intrusion Detection Systems, Incident Response, Premises Liability, Access Control Systems, Security Assessments, Security Management, Video Surveillance, Security Audit
Professional accreditations, licenses, and certificates granted:
Physical Security Professional (PSP), #15117, ASIS International, 2011
C-TPAT Certification - Securing the Supply Chain, 2009
Chemical Facility Anti-Terrorism Standards (CFATS)/Chemical-Terrorism Vulnerability Information Certification, 2009
Affiliations or memberships in any professional and/or industry organizations:
American Society for Industrial Security (ASIS)
International Association of Professional Security Consultants (IAPSC)
FBI InfraGard
Security Industry Association (SIA)
National Defense Industrial Association (NDIA)
Mr. Wurtsmith is an independent security consultant specializing in a comprehensive range of services crucial for premises liability and security negligence cases. From meticulous pre-case reviews to detailed site/existing conditions analysis, he offers tailored solutions to enhance physical security measures and support legal strategies. His expertise spans research and discovery, data an...
Leon M Gussow, MD
Chicago, Illinois
Toxicology, Emergency Medical Toxicology
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Alcohol, Poisoning, opiates, opioids, Marijuana, Overdose, Cannabinoids, cannabis, intoxication, Drug Screening, Dram Shop, Drug Testing, Carbon Monoxide
Over 20 years experience providing consultation and expert witness testimony in cases involving topics including alcohol, marijuana, carbon monoxide, adverse drug effects, drug tests, and urine drug screens. Extensive teaching experience with the Toxikon Consortium Medical Toxicology Fellowship Program in Chicago.
Fellow, American College of Medical Toxicology; Board Certified in Emergency Medicine and Internal Medicine; Medical Consultant, Illinois Poison Control Center; Peer Reviewer, Clinical Toxicology; Peer Reviewer, Journal of Medical Toxicology; Peer Review, Emergency Medicine Journal; Peer Reviewer, Cleveland Clinic Journal of Medicine.
Becky K Lynn, MD, MBA, NCMP, IF
Evora LLC
Illinois
Obstetrics & Gynecology
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pelvic pain, sexual health, sexual medicine, menopause, hormone therapy, transgender, endometriosis, vaginismus, vulvodynia, orgasm, obstetrics, cannabis, marijuana, CBD
I am a board certified Adjunct Associate Professor of Obstetrics and Gynecology at Saint Louis University and the Director of the Evora Center for Menopause and Sexual Health. I who have been in practice for 16 years. I specialize in Sexual Medicine, Menopause and Transgender care. I see patients with painful sex (dyspareunia), chronic pelvic pain, orgasm dysfunction, desire disorders (low libido), vaginismus, vulvodynia and others. I am an expert in hormone therapy in menopausal women. I also manage hormone replacement in both male to female and female to male transgender patients. My published research has focused on the effects of cannabis (marijuana) on female sexual function. I practiced obstetrics for the last 16 years. I have done record review in several cases.
I hold a BA in Economics with a minor in Spanish from the University of California, Berkeley. I graduated from Georgetown University School of Medicine with an MD. I completed a residency in Obstetrics and ...
Shaun R Opie, PhD
Cannabis Laboratories & Testing
E4 Bioscience
Charlevoix, Michigan
Cannabis, Laboratories & Testing
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Laboratory, Cannabis, Marijuana, Compliance, Regulatory, Cannabinoid, THC, Potency, Contaminant, Quality Management System, Audit, ISO 17025, FDA, Clinical, DNA, Molecular, Genetic, Testing
Dr. Opie is a previous founder of multiple analytical testing laboratories in both clinical diagnostics and cannabis compliance testing. He has been a plaintiff, defendant, and cannabis laboratory testing expert witness in multiple legal matters. Since 2018 he has been advising laboratory owners and investors about regulatory, quality, scientific, and business operations issues.
In addition to being a regular invited speaker at national conferences, He is also the editor and contributing author to the textbook, "Cannabis Laboratory Fundamentals". Dr.Opie has written a variety of articles around laboratory operations including: Cannabis Laboratory Planning, Design, Licensing, Instrumentation, and Staffing, A Hemp Growers Guide to Compliance Testing for THC and CBD Levels, A Guide to Preparing Cannabis Laboratory Business License Applications, and How to Start a Cannabis Testing Lab: A Step-by-Step Guide. Dr. Opie is a quality management system lead assessor for laboratories ...
Becky K Lynn, MD, MBA, NCMP, IF
Evora LLC
St. Louis, Missouri
Obstetrics & Gynecology
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pelvic pain, sexual health, sexual medicine, menopause, hormone therapy, transgender, endometriosis, vaginismus, vulvodynia, orgasm, obstetrics, cannabis, marijuana, CBD
I am a board certified Adjunct Associate Professor of Obstetrics and Gynecology at Saint Louis University and the Director of the Evora Center for Menopause and Sexual Health. I who have been in practice for 16 years. I specialize in Sexual Medicine, Menopause and Transgender care. I see patients with painful sex (dyspareunia), chronic pelvic pain, orgasm dysfunction, desire disorders (low libido), vaginismus, vulvodynia and others. I am an expert in hormone therapy in menopausal women. I also manage hormone replacement in both male to female and female to male transgender patients. My published research has focused on the effects of cannabis (marijuana) on female sexual function. I practiced obstetrics for the last 16 years. I have done record review in several cases.
I hold a BA in Economics with a minor in Spanish from the University of California, Berkeley. I graduated from Georgetown University School of Medicine with an MD. I completed a residency in Obstetrics and ...
Jennifer Oyadomari
Forensic Accounting & BV Expert Witness
Forensic Solutions, LLC
Henderson, Nevada
Fraud, Accounting
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Forensic Accounting, Fraud Investigation, Embezzlement, Business Valuation, Economic Damages, Lost Profits, Tracing Analysis, Financial Analysis, Litigation Support, Expert Witness, Fraud Risk Assessment, Business Interruption, Asset Tracing, Income Determination, Family Law, Cannabis
Jennifer Oyadomari is the President of Forensic Solutions, LLC, an accounting firm that specializes in forensic accounting, business valuation, lost profits, and litigation support services. Ms. Oyadomari has almost two decades of professional experience in the areas of financial accounting, business valuation, and forensic accounting. This experience includes positions in the cannabis industry and in the Forensic Advisory practice of BDO USA, LLP.
Ms. Oyadomari is the current instructor of the Fraud Examination course at the University of Nevada, Las Vegas, which is a senior- and graduate-level accounting course.
Ms. Oyadomari has testified in depositions and trials, assisted with mediations and settlements, served as a joint and neutral expert, and served as both a Special Master and as a Receiver.
Ms. Oyadomari earned her Bachelor of Science in Business Administration with an emphasis in Accounting and her Master of Science in Accounting from University of Nevada, Las Vegas....
LaKesha Legree, MD
General Anesthesiologist - Ivy League Trained
Dr. Legree Medical Expert Witness Consulting
Charlotte, North Carolina
Anesthesiology
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Fentanyl, Anesthesia Peri-operative Management, Gastroenterolgy, Ortho trauma/Regional Blocks, Ketamine, Cannabis, difficult airway, wrongful death, Child Neglect/Abuse, Sexual Assault
Duke Fellowship Regional Anesthesia recipient. Over 12 years in active clinical practice. University of Notre Dame graduate in South Bend, IN. Weill Cornell- New York Presbyterian Hospital trained in General Anesthesiology. Extensive ultrasound guided regional anesthesia and block placement at the infamous orthopedic focused Hospital for Special Surgery in New York City. Intense Anesthesia and critical care training at Memorial Sloan Kettering Cancer Hospital in New York. Teaching and mentoring experience. Completed SEAK expert witness training program. Trial (testifying) and deposition experience. Medical chart review, consultation and written reporting experience. Consultations with legal teams to assist with the interpretation of medically related case information. Former Ketamine Clinic owner and expert in off label Ketamine use for depression, suicidal ideations and chronic pain.
She contributes her success as an expert witness to her committment to excellence, voracio...
Bethany Pridgen, MFS
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. 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 is a trained lead and technical assessor for ISO 17025:2017. She is extremely passionate about truth and justice and has learned that the legal system is not always fair. She has a strong desire to see people held accountable to high standards for their work when it affects the lives and freedom of others. She maintains high integrity in her work and interactions.
She became very interested in the growing cannabis industry while working in the forensics world. She believes the cannabis testing industry has a lot to learn from the forensic science industry about how to self-regulate in a world where you are not regulated. She believe...
Heath Jolliff, DO
Medical Toxicology and Forensics Expert
Mid-Ohio Toxicology Services, LLC
Columbus, Ohio
Toxicology, Emergency Medical Toxicology
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Forensic toxicology, Drug Abuse, Overdose, Impairment, Marijuana, Alcohol, Drug testing, DUI, Risk assessment, Cannabis, Opioids
Board Certified in Emergency Medicine and Medical Toxicology.
Fellowship trained at the University of Colorado/Rocky Mountian Poison and Drug Center.
Over 3 decades of clinical experience.
Expert forensics work for over 2 decades
Active Medical License in Colorado and Ohio
Fellow, American College of Medical Toxicology
Previous, Medical Toxicology Fellowship Program Director
Allison A. Muller, Pharm.D, D.ABAT, FAACT
Board-Certified Toxicologist - Penn/CHOP Faculty
Acri Muller Consulting, LLC
Aston, Pennsylvania
Toxicology, Pharmacology- Clinical
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opioids, carbon monoxide, marijuana, cannabis, impairment, DUI, drugs, medication errors, overdose, postmortem, toxicity, medications, drug testing, adverse event, dietary supplement, kratom, fentanyl, oxycodone, lithium, mold
Board-certified toxicologist. Fellow of the American Academy of Clinical Toxicology. Registered pharmacist. Over 20 years’ experience in the field of clinical toxicology.
Two decades as a clinical toxicologist and managing director at the Poison Control Center at The Children’s Hospital of Philadelphia (CHOP), consulting on toxicology cases from 21 counties in Pennsylvania and Delaware.
Expert witness experience has involved cases related to alcohol, drugs of abuse (ie, opioids, marijuana, synthetic cannabinoids, cocaine), carbon monoxide, medication errors, and postmortem toxicology.
Extensive teaching experience including as faculty at the University of Pennsylvania School of Veterinary Medicine.
Michael Moss, MD, FAACT
Salt Lake City, Utah
Toxicology, Addiction Medicine
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Drugs of abuse, Methamphetamine, Cannabis, Marijuana, Heroin, Fentanyl, Urine drug screen, DUI, Adverse drug reaction, Overdose, Poisoning, Impairment, Intoxication, Alcohol
Dr. Moss is a physician in Utah with board certification in medical toxicology, addiction medicine, and emergency medicine. He is a fellow of the American Academy of Clinical Toxicology.
He serves as medical director of the Utah Poison Control Center and has faculty appointments in Emergency Medicine, Psychiatry, and Pharmacy at the University of Utah.
He provides adult and pediatric toxicology consultation at the University of Utah Hospital and Primary Children's Hospital. He also practices addiction medicine at the University of Utah treating substance use disorder including alcohol, methamphetamine, opioids, and benzodiazepines.
Dr. Moss consults on both civil and criminal cases related to toxicology testing, interpretation, impairment, intoxication and the effects of drugs and medications:
-Drugs of abuse (e.g. heroin, opioids, fentanyl, methamphetamine, marijuana)
-Alcohol (ethanol) impairment, intoxication and BAC interpretation
-DUI/DWI
-Urine drug screen testing interpre...
Margaret M Gedde, MD, PhD, DABPath
Gedde Whole Health LLC
Fredericksburg, Virginia
Toxicology, Forensic Pathology
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THC DUI/DWI, Marijuana DUI/DWI, Medical Toxicology, Forensic Toxicology, Cannabis, Medical Marijuana, Hemp, THC, CBD, Cannabinoid Medicine, Cannabinoid Pharmacodynamics, Cannabinoid Pharmacokinetics, THC Blood Testing, THC Drug Testing, Blood Cannabinoids, THC Impairment, Marijuana Impairment
Dr. Gedde provides clinical expertise in medical use of cannabinoids through her cannabis-focused telemedicine practice. She is known for a clinical focus in use of cannabinoids in pediatric epilepsy.
Dr. Gedde is knowledgeable about the environment around medical marijuana for physicians and has been qualified in civil and administrative courts as an expert witness regarding the practice of cannabis medicine.
In addition to the MD degree, Dr. Gedde holds a PhD in Chemistry and is Board Certified in Clinical Pathology, the medical specialty that includes toxicology. As a medical toxicology expert witness, Dr. Gedde brings authoritative clarity to interpretation of blood cannabinoids in criminal and civil THC DUI/DWI cases.
Dr. Gedde’s background also includes post-doctoral research into the molecular biology of bacterial pathogenesis at the University of California at Berkeley and five years in the pharmaceutical industry as a clinical microbiology director and consultant. She h...
Eli C Neal, CPA, ABV, CFF
Cannabis Business Valuation and Damages Expert
4 Corners Financial Forensics
Bellevue, Washington
Business Damages, Cannabis
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Business Valuations, Forensic Accounting, Economic Damages, Cannabis, Lost Profits, Bankruptcy, Business Damages, Commercial Litigation, Shareholder Dissolution, Business Appraisal, Economics, Fraud, Insurance Claims, Products Liability, Lost Wages Damages, Wrongful Death Damages, Invoice Review
Eli solves financial problems for attorneys and their clients with strategic, detailed, and well-reasoned work products. Eli provides business valuations, forensic accounting, and economic damages calculations based on historical financial records and informed assumptions about the future. Ultimately, he thrives when testifying in trial and arbitration to help triers-of-fact understand the financial effect of real-world actions.
In 2018, Eli was selected as an AICPA Forensics and Valuation Services Standing Ovation Award Recipient which recognizes CPAs under 40 years old who exhibit exemplary professional achievement in the forensic accounting and valuation services arena.
You can also find Cannabis Expert Witnesses in:
California, Colorado, Illinois, Michigan, Missouri, Nevada, North Carolina, Ohio, Pennsylvania, Utah, Virginia, and Washington
