Impairment & Human Performance
- Drug impairment | alcohol impairment | human performance
- Drug interactions and drug combinations
- Marijuana impairment
Expert Bio
Litigation-focused expertise in toxicology and impairment evaluation
Matthew W. Myers, MS, MPA
Expert Witness · Consultant · President
7 Arrow Forensics
Matthew W. Myers provides litigation support in matters involving drug- and alcohol-related human performance impairment. With a Master of Science in Clinical Toxicology and more than two decades of law enforcement experience, his work bridges scientific analysis and real-world investigative practice.
His expertise combines a detailed understanding of the pharmacological mechanisms underlying intoxication with extensive experience evaluating impaired individuals in forensic, workplace, and roadside contexts. This applied perspective allows for objective, defensible opinions grounded in both science and observed behavior.
Applied Experience & Qualifications
Mr. Myers has extensive experience utilizing, instructing, and testifying on all National Highway Traffic Safety Administration (NHTSA) sobriety testing programs. He has administered numerous alcohol dosing laboratories in which subjects were dosed to target alcohol concentrations and monitored for behavioral changes, performance effects, and alcohol elimination patterns.
In addition, he has managed alcohol permit compliance and training programs for municipalities overseeing large numbers of licensed establishments. He is a member of several national and international advisory and oversight boards in the fields of sobriety testing, forensic toxicology, and highway safety.
Request a CV for detailed education, certifications, publications, and professional activities.
Areas of Expertise & Engagement
Alcohol Service & Calculations
- Dram shop liability | over-service | noticeable intoxication
- Retrograde extrapolation and forensic alcohol calculations
- Server training programs (TIPS, ServSafe Alcohol, SureSell NOW)
Forensic Evaluation & Evidence
- Forensic toxicology test results and behavioral associations
- Reconstruction of behaviors and evaluation of evidentiary sufficiency
- Drug-facilitated sexual assault
Law Enforcement & Legal Procedures
- DUI / DWI incidents
- DUI detection and Standardized Field Sobriety Testing (SFST)
- Advanced Roadside Impaired Driving Enforcement (ARIDE)
- Drug Recognition Expert (DRE) / Drug Evaluation and Classification Program (DECP)
- Police procedures
- Wrongful arrest and false arrest claims
Workplace Impairment
- Workplace drug impairment
- Reasonable suspicion determinations
- Fitness-for-duty evaluations
Consulting & Expert Witness Services
Mr. Myers works with both plaintiff and defense counsel in civil, criminal, and administrative matters requiring objective evaluation of impairment, performance, and evidentiary reliability. His work is grounded in scientific analysis, applied investigative experience, and adherence to relevant professional and industry standards.