DUI / DWI Related Expert Witnesses: 4

Margaret M. Gedde, MD, PhD, brings authoritative clarity to interpretation of Blood Cannabinoids and other drugs in criminal and civil THC DUI / DWI cases, providing data-driven interpretation of blood levels based on recognized sources in testimony and in written reports. In addition to the MD degree, Dr. Gedde holds a PhD in Chemistry from Stanford University and is Board Certified in Clinical Pathology, the medical specialty that includes toxicology.

Litigation Support - Dr. Gedde has 22 years of experience in clinical practice, with 13 of those in cannabis medicine. She has been in active practice for 9 years as an expert witness for cases involving cannabis and other drugs, with testimony 13 times at a trial, hearing, or deposition in the past four years. Dr. Gedde helps defense attorneys use medical pharmacology and toxicology findings to prepare to cross-examine witnesses who testify regarding interpretation of THC blood tests.

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. As a medical toxicology expert witness. Dr. Gedde’s background also includes post-doctoral research into the molecular biology of bacterial pathogenesis at the University of California at Berkeley and 5 years in the pharmaceutical industry as a clinical microbiology director and consultant.

Expertise:

Forensic Toxicology Cannabis Medical Marijuana THC DUI / DWI Methamphetamine Testing Hemp Testing Blood Alcohol Testing CBD Testing

Cannabinoid Pharmacokinetics Alcohol Hair Testing THC Blood Testing THC Drug Testing Blood Cannabinoids THC Impairment Marijuana Impairment Intellectual Property / Patent Infringement

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.

Sanjay Adhia, MD, MRO, is triple-Board-Certified in Psychiatry, Brain Injury Medicine, and Forensic Psychiatry. In addition to forensic/expert witness practice, Dr. Adhia treats patients at renowned TIRR Memorial Hermann Hospital. His forensic practice focuses on the psychiatric impact of personal injury, medical malpractice, Multi-Plaintiff and Toxic Tort cases, testamentary capacity, undue influence and Dementia, TBI Brain injuries, competency, mental illness and complicating medical conditions. 

Dr. Adhia is among one of a select few Forensic Psychiatrists co-Board-Certified in Brain Injury Medicine. 

Dr. Adhia treats and opines about Traumatic Brain Injury (TBI) in litigation as it can result in psychiatric or neurocognitive impairments. He always assesses for Malingering.

In addition, Dr. Adhia works with Physicians for Human Rights to assess victims of kidnapping and false imprisonment, human trafficking, undue influence, physical and sexual abuse, rape, and fear of imminent death. 

In all populations, he assesses PTSD, Anxiety, Depressive Disorders, risk of suicide, and malingering. 

He is experienced in the treatment and impact of drug and alcohol abuse on decision-making. Dr. Adhia has also treated severe psychosis (Schizophrenia, hallucinations) and psychopathology. He formerly treated patients at a Maximum Security Prison and prison psychiatric hospital. 

Dr. Adhia’s findings consider complicating factors, e.g., emotional distress worsened by active physical and mental conditions, and pre-existing mental and physical illness (e.g. depression, PTSD, Dementia, Alzheimer's, medication.) 

As a physician, Dr. Adhia is uniquely qualified to review and examine and incorporate medical records and doctor reports in his reports. This is especially important in medical-malpractice & standard of care cases in treaters, inpatient, rehab, hospital, government, corrections and psychiatric hospitals. Dr. Adhia is skilled in these med-legal issues. 

He conducts Independent Medical Examinations, review of records, and reports findings to courts and attorneys. He is available to testify in civil, criminal, probate, Federal, Immigration, military, and administrative jurisdictions.

Kerry Mendes, M.D., Child, Adolescent and Adult Forensic Psychiatrist joined Dr. Adhia in 2022.

Violence Sexual abuse Malpractice and Standard of Care Alcohol and Drug Abuse Dementia and IDD Psychopharmacology Competency

PTSD Suicide Psychiatric Injury Will Contest Correctional Fitness for Duty Brain Injury

Ted W. Simon, PhD, DABT, is an award winning Environmental Toxicologist and Scientist. His expertise is in toxicology, risk assessment, mathematical modeling, statistics, neuroscience, and environmental / ecological health issues.

Dr. Simon has over 10 years of experience as a toxicologist employed by the Environmental Protection Agency (EPA). He served as EPA’s senior toxicologist in the waste management division working on risk and soil cleanup.

Teaching Experience - Since 2001, Dr. Simon has served as an Instructor / Adjunct Professor in the Department of Environmental Health Science, College of Public Health, at the University of Georgia.

Public Speaker - Well published, including the author of a textbook on toxicology and environmental risk assessment, Dr. Simon has extensive national and international public speaking experience. Since 1996, he has been delivering seminars and lectures to universities and national institutes on many subjects within his area of expertise. In 2016, he delivered a lectures on “Bayesian Methods for Application of Uncertainty Factors,” to the Society of Toxicology Annual Meeting, New Orleans, LA, and “Quantitative Prediction of Phenotypic Change from High Throughput Assay Results,” to the EPA's Workshop on In Vitro to In Vivo Extrapolation, Research Triangle Park, NC.

Litigation Support - Dr. Simon has over 15 years of experience offering expert witness services to counsel representing both plaintiff and defendant. He has been retained over 20 times since 2000 for cases involving environmental risk, drug and alcohol cases, DUI, accidental poisoning, and intellectual property. Dr. Simon has particular expertise in dioxin-like chemicals and polychlorinated biphenyls (PCBs). His services include consulting, reports, deposition, and trial testimony when necessary.

Areas of Expertise:

Dioxins PCBs Drugs Alcohol Poisoning DUI / DWI Water Contamination Soil Contamination Environmental Risk Assessment

Environmental Toxicology Carcinogenicity Food Contamination Pesticides Fracking Lead Marijuana Polychlorinated Biphenyls Intellectual Property

Dr. David H. Schaffer, MD, MRO is a Harvard-trained, dual-boarded MD in both Medical Toxicology and Emergency Medicine, serving as the Director of Medical Toxicology at the University of South Carolina School of Medicine in Greenville, SC and Prisma Health–Upstate hospitals. He is also a certified Medical Review Officer (MRO, MROCC).

Dr. Schaffer is extensively published and is an experienced expert witness in cases including Med Mal, wrongful death, personal injury, child custody, and more.