Toxicology Expert Witnesses in Arizona

Pharmacology- Clinical, Toxicology - DUI, Medication Adverse Effects, Overdose, Personal Injury, Medical Malpractice, Toxic Exposure, Medication Errors, Adverse Drug Reactions, Lead, Mold, Pesticides, Wrongful Death, Retrograde Extrapolation, Alcohol, Drugs of Abuse, Environmental Exposure, Postmortem Toxicology, Forensic Toxicology, Litigation Support, Public Health

Dr. Aaron Hilliard obtained his Doctor of Philosophy degree in Pharmacology/Toxicology from Meharry Medical College. After completing his Ph.D., he continued his research in Pharmacology and Forensic Toxicology at the Johns Hopkins School of Public Health, Division of Toxicological Sciences. Dr. Hilliard has served at the Florida Department of Health and held faculty appointments at the University of Florida. He is currently a tenured Associate Professor at Florida A&M University in the College of Pharmacy. He has authored several peer-reviewed publications related to pharmacology, toxicology, and the environmental impact of chemicals. Dr. Hilliard also brings 25 years of experience providing deposition and trial testimony in Pharmacology and Forensic Toxicology for both Plaintiff and Defense in Federal, State, Criminal, and Civil cases. Dr. Hilliard is a highly qualified expert in toxicology and pharmacology, offering a deep scientific foundation and over 25 years of applied exper...

Toxicology, Pathology - Board-Certified Trial Attorney, Laboratory, Blood testing, Breath Testing, Hospital Testing, Alcohol Impairment, drug impairment, alcohol testing, drug testing, drug effects, drug levels, postmortem drugs, postmortem alcohol, forensic science, blood alcohol, blood drugs, urine testing, urine drug tests, urine alcohol tests, Pathology

Forensic Toxicologist & Nationally Board-Certified Trial Attorney Okorie Okorocha is highly sought-after as both an attorney and an expert witness. Being dual-trained in Law & Toxicology is a deadly combination. As one attorney surmised: “Cross-examining Trial Attorney & Toxicologist Okorie Okorocha is like a knife fight in a phone booth & results in the cross-examiner taking an incredible beating! On the other hand, getting cross-examined by an attorney that know far more about the science than the witness is the witness’s worst nightmare.” Highly sought-after Forensic Toxicologist & Trial Attorney retained as a Toxicology Expert Witness in high-profile cases nation-wide such as: Estate of George Floyd vs. City of Minneapolis Doe vs. Derrick Rose (former NBA MVP) Hawaii vs. Villa (high-profile baby manslaughter case) Michigan vs. Chidester For exemplar's of Okorie Okorocha's testimony, go to https://www.youtube.com/playlist?list=PLFchrJ9bFOmKXSxY9KOAkoKNNB-G6HfO1 Okorie ...

Toxicology, Emergency Medicine - Drug Testing, Toxicology, Overdose, Drug Levels, Chemical Exposure, Alcohol, Fentanyl, Carbon Monoxide, Poisoning, Opioids, Med Mal, Medical Toxicology, Marijuana, Impairment, Methamphetamine, Opiates, Child Custody, Drugs, Toxic Tort, Hair Testing

Dr. David H. Schaffer, MD, MRO is dual-boarded 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 has published extensively in the fields of Medical Toxicology and Emergency Medicine. Outside of clinical practice and the occasional courtroom appearance, Dr. Schaffer has also consulted for major organizations—including SpaceX, Butterfly Network, and governmental entities—on a variety of clinical matters. Dr. Schaffer earned his medical degree from the University of North Carolina School of Medicine, completed his residency at Harvard, where he served as a Clinical Fellow at Harvard Medical School, and subsequently trained in Medical Toxicology at the University of Virginia. He is a practicing physician with extensive publications and speaking records, is reg...

Phoenix, Arizona

Emergency Medicine, Toxicology - Pharmacology, family law, product liability, sepsis, trauma, overdose, poisoning, antidotes, personal injury, resuscitation, drug abuse, drug withdrawal, alcohol impairment, drug testing, medical director, dram shop, post-mortem, healthcare administration, personal injury, drug impairment

I am a clinically practicing medical doctor who is board certified in both emergency medicine and medical toxicology. I have been an expert witness for several years, with deposition and trial testimony experience, serving both as an emergency medicine and medical toxicology expert. My toxicology and emergency medicine expertise has been of service to clients within multiple areas of law, including medical malpractice, product liability (medication delivery systems, etc.), dram shop, personal injury, traffic incidents with drug/ alcohol impairment questions, criminal law (review of substance use/ toxicology testing), family law (custody cases whereby parties require toxicology expert review of urine drug tests, etc.), civil tort (questions of drug/ alcohol use being integral to the case), and wrongful death (individual who died in legal custody and drug use/ exposure is in question) to name a few. In many of the medical malpractice cases, my combination of dual specialty knowled...

Phoenix, Arizona

Toxicology, Neuropathology - neurotoxicology, Parkinson's, pesticides, heavy metals, environmental toxicology, neurological disease, neuropathology, drugs of abuse, neurodegeneration, neuroinflammation, toxicology

Dr. Ronald Tjalkens, Ph.D., is a Professor of Neurology and Translational Neuroscience with over 25 years of NIH-funded research experience in Neurotoxicology investigating the molecular and cellular mechanisms of neuroinflammation and its role in the progression of neurodegenerative disorders, including Parkinson’s disease and Alzheimer’s disease. His expertise spans neurotoxicology, neuropharmacology, and the effects of environmental exposures—such as heavy metals, pesticides, neurotropic viruses, and pharmacologic agents—on the nervous system. He has extensive experience using translational models of neurodegeneration, advanced imaging techniques, and AI-based image analysis to evaluate neuroinflammatory injury and identify therapeutic targets in glial cells. Dr. Tjalkens has served as an expert witness in both civil and criminal cases involving neurotoxic injury, providing testimony on causation and mechanisms of neurological damage, and brings an internationally recognized reco...