Dr. Lawrence Masten has over 40 years experience as a toxicologist. He received a PhD in Toxicology from the University of Michigan, a 2-year NIH postdoctoral in drug toxicology from the Univeristy of California, San Francisco Medical Center, and has been board certified (DABT) by the American Board of Toxicology since 1980. He has 8 years academic experience (Assistant Professor of Pharmacology and Toxicology), and 22 years research experience in the pharma and chemical industries. He authored 56 publications and 9 patents. Dr. Masten has been a toxicology consultant/ expert witness in civil and criminal cases for over 18 years. These included DUI/ DWI/ BUI/ DUI manslaughter, first degree murder, products liability, worker’s compensation, medical malpractice, and wrongful death cases. He has hands-on research experience with drugs, alcohols, consumer products, gasoline and petroleum products and additives, industrial chemicals, pesticides, food additives, food supplements, and vitamins. His curriculum vitae is available on request.

Areas of Expertise
  • Alcohol
  • Alcohol, Drug & DUI Testing
  • Biochemistry
  • Chemicals
  • Drug Abuse
  • Medical Malpractice
  • Medical Toxicology
  • Occupational Medicine
  • Pesticides
  • Petrochemicals
  • Pharmacology
  • Plastics
  • Wrongful Death

Expert Background
Q: Please list your professional accreditations, degrees, licenses, and certificates granted:
A: BS in Biochemistry, Michigan State University, East Lansing, MI
PhD in Toxicology, University of Michigan, Ann Arbor, MI
NIH Postdoctoral in Drug Toxicology, University of California, San Francisco Medical Center, San Francisco, CA

Diplomate, American Board of Toxicology

Q: Please list your affiliations or memberships in any professional and/or industry organizations:
A: Society of Toxicology
American College of Toxicology
International Society of Regulatory Toxicology and Pharmacology
Regulatory Affairs Professional Society
Q: Please list any teaching or speaking experience you have had, including subject matter:
A: While in an NIH postdoctal, I taught portions of toxicology courses to undergraduates at San Francisco State University, College of Marin College, and San Quentin State Prison (accredited by Sonoma State University). Also I taught toxicology to medical, dental, pharmacy, nursing and graduate students. At the University of Mississippi, as a tenured assistant professor of pharmacology and toxicology, I set up a doctoral program in toxicology with a core toxicology course curriculum. As a result of the six years I was there, 11 students received their PhD degrees. Also I taught an undergraduate course in forensic toxicology.

In industry, I was group leader in general toxicology for a group of 5 pharma related companies (Revlon Health Care Group) and, for 13 years, principal toxicologist (ARCO Chemical Company) responsible for FDA related projects. Both positions involved teaching and speaking experience.

As an example, I organized the workshop: Optimizing The Review Process of Food Additives and GRAS Petitions. This one-day workshop in Washington DC, was sponsored by the International Society of Regulatory Toxicology and Pharmacology. Two panels of FDA and Industry members (including myself) discussed potential solutions for the approval of macronutrient additives. I edited a series of papers from this workshop, published by the journal Regulatory Toxicology and Pharmacology.

Q: Have any of your accreditations ever been investigated, suspended or removed? (if yes, explain)
A: No
Q: On how many occasions have you been retained as an expert?
A: Over 150 times.
Q: For what area(s) of expertise have you been retained as an expert?
A: Toxicology, Forensic Toxicology
Q: In what percentage of your cases were you retained by the plaintiff?
A: About 50% in civil cases
Q: In what percentage of your cases were you retained by the defendant?
A: About 50% in civil cases
Q: On how many occasions have you had your deposition taken?
A: 100+
Q: When was the last time you had your deposition taken?
A: April 2018
Q: On how many occasions have you been qualified by a court to give expert testimony?
A: over 140 in hearings and trials.
Q: On how many occasions have you testified as an expert in court or before an arbitrator?
A: Over 110 in US state and federal courts. Also in Ecuador.
Q: For how many years have you worked with the legal industry as an expert?
A: 16 years total during three periods of my career. Started in 1977.
Q: What services do you offer? (E.g.: consulting, testing, reports, site inspections etc.)
A: Testifying as an expert witness in toxicology; writing affidavits on my expert opinion; reviewing records, interviewing clients, and consulting; examination and photographing forensic blood evidence; identifying testing/toxicology labs; and monitoring the testing of commercial products and forensic evidence; and interpretation of preclinical and clinical results.
Q: What is your hourly rate to consult with an attorney?
A: $400/hr
Q: What is your hourly rate to review documents?
A: $400/hr
Q: What is your hourly rate to provide deposition testimony?
A: $400/hr
Q: What is your hourly rate to provide testimony at trial?
A: $400/hr
Q: Please list any fees other than those stated above (E.g.: travel expenses, copy fees, etc.)
A: Out-of-pocket expenses such as travel related expenses are extra. However, there is no charge for travel time or clerical time e.g. computer searches and typing of expert reports.


References upon request.

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