TCAS
Toxicology Consultants & Assessment Specialists, LLC

9 found, showing page 1 of 1  
Drugs of Abuse   Toxic Substances: Drugs of Abuse
Drugs of abuse are well-documented in the peer-reviewed toxicological literature. a TCAS has provided toxicological guidance, written assessments and expert testimony in hundreds of drug-related cases. Virtually all drugs of abuse are well-documented in the peer-reviewed toxicological literature with clearly-established endpoints. However, drugs of... (more)

Toxicology of Pharmaceuticals   Toxic Substances: Toxicology of Pharmaceuticals
TCAS has broad experience with pharmaceutical toxicology. a TCAS has wide experience with pharmaceutical toxicology and has performed many assessments involving prescription medications, drugs of abuse, vaccines and over-the-counter preparations. Although pharmaceutical use can be a significant toxicological factor in a variety of claims, the real... (more)

Toxicology of Pesticides   Hazardous Substances: Toxicology of Pesticides
Overview Pathways of pesticide movement in the hydrologic cycle USGS [a] Pesticides are in widespread use throughout the U.S. and the rest of the world. There are many classes of pesticides including insecticides pyrethrins and pyrethroids, n-methyl carbamates, organophosphate insecticides, organochlorines, biologicals and acaricides , herbicides chlorophenoxy... (more)

Hair Samples Yield Incorrect Cocaine Use Conclusion   Case Studies in Toxicology: Hair Samples Yield Incorrect Cocaine Use Conclusion
This case study recounts the circumstances relating to a teacher faced with pending dismissal for alleged drug use based on erroneous interpretation of cocaine in hair test samples. This case illustrates the importance of applying a correct, peer-reviewed scientific methodology to laboratory analyses and interpreting the results in line with established... (more)

Acute Marijuana Intoxication   Case Studies in Toxicology: Acute Marijuana Intoxication
Contributes to Fatal Motorcycle Accident This case study illustrates how circumstantial evidence can be misinterpreted and how drug-impaired judgment and behavior can be regarded as evidential in a toxicological causation assessment. Accident Summary A motorcyclist was fatally injured when he collided with a city bus in a business district. a,b A motorcyclist... (more)

Workmen's Compensation Benefits Denied for Presumed Drug Use?   Case Studies in Toxicology: Workmen's Compensation Benefits Denied for Presumed Drug Use?
This case study summarizes a recent matter in which a worker was injured while on the job, then later denied Workmen's Compensation benefits when drug use was alleged. It illustrates the key importance of rebutting presumptions through objective assessment of clear and convincing toxicological evidence. A lineman working on power lines received a serious... (more)

Professional Experience and Toxicological Specializations   Professional Experience and Toxicological Specializations
TCAS has assessed hundreds of different types of toxic substances and exposure effects. [a] TCAS provides professional, comprehensive forensic and environmental exposure analysis, risk assessments and causation determinations. With more than 28 years of hands-on experience, our cases cover a vast range of toxic exposure-related issues combining toxicological... (more)

Dr. William R. Sawyer, Toxicologist   Home: Dr. William R. Sawyer, Toxicologist
Ph.D., Diplomate, American Board of Forensic Medicine D-ABFM Dr. William R. Sawyer is an expert forensic toxicologist For more than 28 years expert toxicologist Dr. William R. Sawyer has been providing forensic toxicology consulting services and expert testimony. A diplomate of the American Board of Forensic Medicine, Dr. Sawyer has extensive experience... (more)

Site Map   Site Map
Toxicology Consultants and Assessment Specialists, LLC TCAS has devoted its website to the role of the expert toxicologist and the science of toxicology. The following pages present both original and edited public-domain information compiled as a useful educational resource. This site map is a content reference intended to assist with rapid location... (more)

A Message from Dr. William R. Sawyer
Chief Toxicologist, TCAS, LLC

A message from Dr. William R. Sawyer, Expert Toxicologist

"Assessing the direct and indirect impacts of drugs of abuse requires close attention to detail. Adhering to generally-accepted, peer-reviewed methods and the results of human studies are the best ways to ensure credible results that will stand up to scientific scrutiny."

 Home   |  Experience  |  Toxic Substances  |  Case Studies  |  CV  |  News  |  About  |  Site Map  |  Contact
Toxic Exposures  |  Environmental Testing  |  Risk Assessment  |  Forensic Toxicology  |  Causation Evaluation
Dioxin  |  LNAPL  |  Hazardous Substances  |  Heavy Metals  |  Alcohol Toxicology  |  Drugs of Abuse
Environmental Hazards  |  Industrial Chemicals  |  Hydrocarbons  |  Metals & Compounds  |  Pesticides
Pharmaceutical Toxicology  |  Consumer Products  |  Human Health Risk Assessments

This is an informational and instructional website devoted to toxicology. It presents both original and edited public-domain content compiled as a useful educational resource. References and footnotes have been included wherever possible and image sources have been cited where appropriate. Although most pages can be printed or downloaded as PDF files (and we encourage you to make constructive use of our information), this website is copyrighted and material may only be reproduced and/or distributed with prior permission from TCAS, LLC.