Professor Emeritus, Board Certified Toxicologist, PhD in Microbiology
Expert Witness and Consult in the Life Sciences

  • Specializing in complex multidisciplinary cases
  • Reference-documented reports
  • Medical causation
  • Mechanisms of Disease
  • Risk assessment
  • Assistance with cross-examination of other experts
  • Explanation of case science to Juries
  • Serving as a Master for Judges
Appointments: Professor Emeritus, University of Missouri, Columbia, MO; Dalton Cardiovascular Research Center, the Graduate School; Department of Molecular Microbiology and Immunology, School of Medicine; Dept. of Biomedical Sciences & Adjunct Professor of Pathology, College of Veterinary Medicine

Intelligence guided by experience- Doing a task well is efficient; doing the right task well is effective.

Telephone 573-449-7444


Dr. Olen Brown



  • Microbiology PhD, University of Oklahoma, 1964.
  • Board Certified Diplomate in Toxicology, 1989 - present (Member Standards of Knowledge Committee).
  • Fellow in Chemistry and Chemical Engineering, American Association of Chemists.
  • Broad teaching and research experience in the Life Sciences focusing on Human Medicine using the disciplines of bacteriology, virology, immunology, epidemiology, biochemistry, physiology, analytical chemistry, toxicology, epidemiology and environmental sciences.
  • Consulting and Peer Review extensively with the EPA, Superfund, NIH, NIEHS, and others.
  • Listed in American Men and Women of Science; Marquis Who's Who in the World and in America; and a dozen other sources. 
  • Over $6,500,000 in federal research grants, and over 150 scientific publications.
  • Stress mechanisms of toxicity, including oxygen free radical biology and chemistry for various diseases of the brain (Parkinson's, Alzheimer's) and lung (COPD, RADS, Asthma), premature infant oxygen therapy, and various therapeutics.
  • Author: "The Art and Science of Expert Witnessing", Cypress Publishing Group, 2002, and “Miracles”, BookSurge Publishing, 2007. 
  • Professorships (teaching and research) in Molecular Microbiology and Immunology, School of Medicine; Biomedical Sciences, College of Veterinary Medicine; and John M. Dalton Cardiovascular Research Center, University of Missouri, Columbia.
  • A 40+ page resume, including a list of attorneys I have assisted, is available on request via mail or e-mail.
Scientific expert witnessing and consulting broadly in the Life Sciences, including: Toxicology (including academic, general, forensic, pharmaceutical and governmental); safety review of medical devices and therapeutics; white papers; risk assessment; review of medical records for cause-and-effect; medical writing; and serving trial judges as a master.

 Expert witness since early 1980s; defense/plaintiff, civil/criminal; as a pre-trial consultant, and disclosed for depositions and trials,  affidavits, and workman's compensation cases.. Hired for 180+ cases in NY, MO, KS, TX, OK, IL, AR, AL, FL, CA, CO, MI, MS,  TN, IA, WV, NE, NC, SC, NV, MD, WY, KY, WA, and OH, Plus Toronto, Canada. 31 depositions and 20 trials including for Mound,  Cotton, Wollan & Greenglass, Manhattan, NYC; Fulbright and Jaworski, Houston; Shook Hardy and Bacon, KC; Faust Goetz  Schenker & Blee, Manhattan, NY; Ford Parshall and Baker, Columbia, MO; Goldstein and Price, St. Louis; Helfrey Simon and  Jones, St. Louis.
  • Evaluating the scientific merit of complex cases requiring broad knowledge and experience.
  • Cause-and-effect relationships (as opposed to associations) for chronic and acute toxic exposures to environmental and workplace chemical, including asbestos (defense), benzene and other solvents, metals (lead, zinc, manganese, and other metals), particulates (including nanoparticles), dusts and gases (including carbon monoxide), and most organic and inorganic chemicals affecting most organ systems.
  • Infectious diseases, antibiotic therapy, mold exposure (allergic reactions and infections- histoplasmosis, blastomycosis), epidemiology, Immunology.
  • Environmental spills and contaminations (air, water,  soil); examples: LUST, gasoline, diesel, PAH. 
  • Alleged pestidide (herbicide, rodenticide, biocide) drift and/or misuse.
  • Alcohol and illicit drug use (including criminal), and ethical drugs for impairment (examples: boating and vehicle accidents, including barge crashes).
  • Odor assessment and remediation for lagoons, CAFUS, and the deoderant and perfume industries.
  • Serving as an Independent Master at trial for Judges for complex, scientific issues.
  • The White House,  unpaid consultant for Carlton Turner, Director, Drug Abuse Policy Office for President Ronald Reagan, relative to Marijuana, 1982.
  • Consultant for Corporations and Universitites, 981 to present. Consultant for Guideline/Intota (formerly Sophion Tech); Douglas Peterson, Inc.; Reuters; Gerson Lehman; The Round Table Group; The ScienceAdvisory Board; Thompson West; IMS Expert Services; Martindale; and Eastern Research Group.
  • Invited Reviewer for the American Association for the Advancement of Science: 45 books and films.
  • Invited Test Item Writer: MCAT and ACT, medical school and college admission tests, 1990-91 and 1992, respectively
  • Invited Judge: Research & Development Magazine's 100 Adwards, 1996, 1999; and annually for the past 10 years, judge for acceptability of abstracts submitted by scientists for the Annual Meeting of the Society of Free Radical Biology and Medicine.
  • Peer Reviewer for Superfund Research for NIEHS: 1990-1991, 1994, 1999, 2004, 2005.
  • Peer Reviewer for NIH, NIEHS, EPA, and CDC for medically-related SCOR Projects and Grants: 1979, 1986, 1999; and for the EPA:1998, 1999-2000, 2003-2008, and for ATSDR (Agency for Toxic Substances and Disease Registry pf the CDC); and HEAST (Health Effects Assessment Summary Tables); Toxidity Profiles (including cancer risk assessment, and acute, subchronic, and chronic toxicities and related risk assessment documents for specific chemicals.
  • Peer Reviews administered by the Eastern ResearchGroup, and The American Institute for Biological Sciences: 1997-
  • Peer Reviews for the US Army Medical Research & Material Command, Defense Department; Naval Medical Research; amd Kansas DEPSCoR 2000: 1995-96 and 1997-1998.
  • Peer Reviewer for Scientific Journals, and service on Editorial Boards: Peer reviewer: Proceedings of the National Academy of Science, Analytical Biochemistry, Environmental Health Perspectives, American Journal of Physiology, Heart and Circulatory Physiology, Archives of Biochemistry and Biophysics, Free Radical Biology and Medicine, Biochemical Letters, Chemical Research in Toxicology, International Journal of Biomedical Science, and others. Editorial Boards: Biomedical Letters, The Faculty Press, Cambridge, England, 1991-1995; and Managing Editorial Board for Frontiers of Bioscience, an on-line Encyclopedia of Science and Medicine, 2003-. 

 Olen R. Brown, Ph.D., Professor Emeritus

 527 North Cedar Lake Drive West, Columbia, MO 65203

 Telephone 573-449-7444; and e-mail
BrownO@missouri.edu (Revised: December, 2013)