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Specialties & Experience of this Expert Witness

General Specialties:

Toxicology and Occupational Medicine

Keywords/Search Terms:

Lead poisoning, cannabis, drug testing, alcohol, marijuana, environmental toxicology, occupational toxicology, arsenic poisoning, forensic toxicology, DUI, risk assessment, aviation toxicology, medical monitoring


MD, University of California, San Francisco; MPH, University of California, Berkeley

Years in Practice:


Number of Times Deposed/Testified in Last 4 Yrs:


Additional Information

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 (consultant on lead toxicology) • State of Colorado, Retail Marijuana Public Health Advisory Committee, Technical Consultant Academic Affiliations: • Associate Clinical Professor, Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado School of Medicine • Associate Adjunct Professor, Department of Environmental and Occupational Health, Colorado School of Public Health • Attending Physician, Rocky Mountain Poison and Drug Safety (Poison Control Center, Denver, CO) • Co-Principal Investigator: Observational Study of Driving Impairment in Occasional versus Heavy Marijuana Users, 2017-2020, University of Colorado • Co-Investigator "Novel Approaches to Assessing Cannabis-Impaired Driving" NIH R01, University of Colorado/Colorado School of Public Health 34 years of experience as testifying expert in federal and state courts