Toxicology
Margaret M. Gedde
MD, PhD, DABPath
Fredericksburg, VA40 years+ yrs★ 9.1
Forensic toxicology test interpretationCannabinoid pharmacokineticsMarijuana driving impairment+6
Browse our verified directory of expert witnesses spanning medicine, engineering, finance, and dozens of specialized fields.
Showing 91–108 of 1,756 experts
MD, PhD, DABPath
Margaret M. Gedde, MD, PhD, DABPath is a forensic toxicology expert specializing in cannabinoid pharmacokinetics and marijuana driving impairment. With a career encompassing clinical pathology, cannabinoid medicine, and forensic toxicology, she brings a multifaceted perspective to her litigation work. Her work centers on investigating forensic toxicology test results, assessing cannabinoid pharmacokinetics, and evaluating whether marijuana impairment influenced driving capabilities. Dr. Gedde has been retained in numerous expert witness and consulting engagements across the United States, involving criminal, civil, employment, parental, regulatory, and patent cases. Her MD from Stanford University School of Medicine and PhD in Biophysical Chemistry, along with her Board Certification in Clinical Pathology, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving THC impairment and forensic toxicology testing.
Expert Witness - Forensic Examination | Risk Management | Financial Crimes Investigation
Alex Kulikov, MS, CFCI, CFCS, GAAP, PMP is a forensic examination and financial crimes investigation expert specializing in internal and external fraud risk, white-collar crime, and money laundering & RICO cases. With a career spanning forensic examination, financial crimes investigations, and risk management, he brings a multidisciplinary approach to litigation support. His work centers on investigating financial misconduct, assessing compliance with regulatory standards, and evaluating whether breaches of fiduciary duty have occurred. Mr. Kulikov has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as real estate and bank fraud, contract disputes, and cybercrime. His Master of Science in International Studies & Economics, along with certifications such as Certified Financial Crimes Investigator and Certified Financial Crimes Specialist, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving financial misconduct and regulatory compliance.
Certified Forensic Identification Consultant
Kourosh Nikoui, Certified Forensic Identification Consultant is a forensic identification expert specializing in crime scene investigation and latent print analysis. With a career spanning forensic science, criminalistics, and forensic photography, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating crime scenes, assessing latent print evidence, and evaluating the authenticity of forensic identifications. Mr. Nikoui has been retained in numerous expert witness and consulting engagements across the United States, involving complex forensic identification and crime scene reconstruction cases. His Bachelor Degree in Fine Arts in Photography, along with certifications as a Certified Latent Print Examiner, Certified Senior Crime Scene Analyst, and Certified Forensic Photographer, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving forensic identification and crime scene analysis.
President
William Stamps Howard, Ph.D. is a Mechanical Engineering and Industrial Automation expert specializing in intellectual property, safety engineering, and the design and development of industrial machinery. With a career spanning mechanical design, electrical design, software development, and industrial automation, he brings a multidisciplinary perspective to litigation work. His work centers on investigating mechanical failures, assessing compliance with safety standards, and evaluating whether design specifications meet contractual obligations. Mr. Howard has been retained in numerous expert witness and consulting engagements across the United States, involving patent, trade secret, tort, and contract cases. His Doctor of Philosophy in Robotics & Grasping, along with his Professional Engineer certifications in GA, NJ, and AL, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation and responsibility in disputes involving mechanical and industrial systems.
Security Consultant
Mark Harless, MS, PSP is a security consultant expert specializing in security negligence and premises liability litigation. With a career that spans federal law enforcement and corporate cybersecurity, he brings a unique blend of investigative and strategic insight to his litigation work. His work centers on conducting security assessments, developing risk mitigation strategies, and evaluating compliance with industry standards. Mr. Harless has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to security negligence, premises liability, and complex fraud analysis. His Master of Science in Criminology from Florida State University, along with his Physical Security Professional (PSP) certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving physical security and threat intelligence.
Hospitality Industry Expert in Standard of Care and Operational Disputes
Kenneth C. Free, MBA, RRP, CMHS is a hospitality industry expert specializing in standard of care and operational disputes. With a career spanning hotel operations, asset management, development, and financial oversight, he brings a real-world operational framework to analyzing where deviations from industry standards may have occurred. His work centers on investigating hospitality standard of care, assessing business interruption damages, and evaluating whether hotel operations liability has been breached. Mr. Free has been retained in numerous expert witness and consulting engagements across the United States and internationally, involving hospitality standard of care, business interruption damages, and hotel operations liability. His MBA in Finance, along with Registered Resort Professional (RRP) and Certified Master Hotel Supplier (CMHS) certifications, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standard of care in disputes involving hospitality operations.
Managing Partner | Expert Witness – Physical Security
Shawn F. Wurtsmith, MBA, PSP is a physical security expert specializing in inadequate/negligent security and premises liability litigation. With a career spanning security program management, threat and vulnerability assessment, and emergency response planning, he brings a strategic framework to analyzing security failures and operational deviations. His work centers on investigating security negligence, assessing premises liability, and evaluating whether emergency response protocols meet industry standards. Mr. Wurtsmith has been retained in numerous expert witness and consulting engagements nationwide, involving cases across governmental, healthcare, cannabis, petrochemical, hospitality, defense, and themed entertainment sectors. His Master of Business Administration in Business Management, along with certifications such as Physical Security Professional (PSP), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving physical security standards and negligence.
Forensic Accounting and Valuation Expert
Dr. Barbara C. Luna, PhD, MS, BA, CPA, ASA, CVA, ABV, CGREA, CCREA, CREA, CFE, CFFA, CFF, CMC is a forensic accounting and valuation expert specializing in damages, valuation, and fraud litigation. With a career encompassing diverse sectors such as breach of contract, intellectual property, and business dissolution, she brings a multifaceted analytical framework to her litigation work. Her work centers on investigating fraud, assessing lost profits, and evaluating liability issues. Dr. Luna has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as construction defects, securities fraud, and marital dissolution. Her PhD in Applied Mathematics from Harvard University, along with certifications such as Certified Public Accountant and Certified Fraud Examiner, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving financial analysis and business valuation.
Safety Expert Witness
Dustin L. Hickey, CSP, CRSP, CMIOSH, CMQ/OE is a safety and health expert specializing in OSHA compliance and safety standards litigation. With a career encompassing diverse roles in occupational safety and health, he brings a comprehensive regulatory and operational perspective to his litigation work. His work centers on investigating compliance with safety regulations, assessing workplace hazards, and evaluating whether industry standards were met. Mr. Hickey has been retained in numerous expert witness and consulting engagements across the United States, involving serious injury, fatality, labor arbitration, and construction defect cases. His Bachelor of Science in Occupational Safety and Health, along with certifications such as Certified Safety Professional (CSP) and Chartered Member of IOSH (CMIOSH), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving workplace safety and health.
Experienced Contractor/Consultant
David L. Mefford is a construction and remediation expert specializing in construction defects, water damage, fire, sewage, and mold litigation. With a career spanning over five decades in building, restoration, and remediation, he brings a practical and comprehensive framework to litigation work. His work centers on investigating construction defects, assessing water and fire damage, and evaluating whether industry standards were met in remediation efforts. Mr. Mefford has been retained in numerous expert witness and consulting engagements across the United States, involving cases of construction defects, mold remediation, and water intrusion. His Certified Restorer designation from the Restoration Industry Association (RIA), along with his Certified Mold Professional certification from the Institute of Inspection, Cleaning and Restoration Certification (IICRC), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving construction and remediation issues.
Design or CAD/CAM Engineering, Technical Writer, Manufacturer, Builder, Machinist & Certified Welder
Michael Troy Richardson, BS, MA, MS is an aerial adventure and amusement attraction safety expert specializing in litigation involving zipline and trampoline park accidents. With a career spanning engineering, technical writing, and product development, he brings a multi-disciplinary perspective to analyzing safety standards and operational compliance in the amusement industry. His work centers on investigating accident causation, assessing compliance with safety standards, and evaluating whether operational negligence contributed to incidents. Mr. Richardson has been retained in numerous expert witness and consulting engagements across the United States, involving cases in the aerial adventure, zipline, and amusement park industries. His MS in Engineering & Technology, along with certifications such as the National Board Certified Pressure Vessel Welder, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving amusement ride safety and operational standards.
Attorney-At-Law & Certified Mediator
Emmanuel Coffy, MSEE, JD – Attorney-At-Law & Certified Mediator - USPTO Reg. No. 63,615 is a patent law expert specializing in patent infringement assessments and litigation support. With a career spanning solid-state electronics, semiconductor devices, and microelectronic circuits, he brings a nuanced understanding of technical complexities to his litigation work. His work centers on conducting expert interviews, drafting legal documents, and evaluating patent validity and infringement. Mr. Coffy has been retained in numerous expert witness and consulting engagements across the United States, involving patent infringement and intellectual property disputes. His J.D. in Intellectual Property from Seton Hall University School of Law, along with his registration with the United States Patent and Trademark Office (Reg. No. 63,615), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of infringement and validity in disputes involving advanced technologies and intellectual property rights.
Managing Partner
Stephen T. (Troy) Newman, CPP is a premises liability and negligent security expert specializing in cases involving multi-family housing, retail, and commercial establishments. With a career encompassing military leadership, emergency management, and security consulting, he brings a strategic and operational framework to litigation work. His work centers on investigating security program compliance, assessing foreseeability in violent crime incidents, and evaluating whether security deficiencies contributed to harm. Mr. Newman has been retained in numerous expert witness and consulting engagements across the United States, involving cases at apartments, gas stations, convenience stores, and other commercial properties. His Bachelor’s in Criminal Justice from Mercer University, along with his Certified Protection Professional (CPP) designation, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security standards and practices.
Digital Forensics Expert
David Greetham, Certified Forensic Litigation Consultant, Certified eDiscovery Specialist, Certified Computer Crime Investigator, Certified Computer Forensic Technician, Certified Information Governance Officer, Certified Fraud Examiner is a digital forensics expert specializing in eDiscovery methodologies and forensic analysis. With a career encompassing leadership roles in digital forensics and eDiscovery, he brings a strategic perspective to litigation involving complex data environments. His work centers on investigating digital evidence, assessing eDiscovery processes, and evaluating whether information governance standards have been met. Mr. Greetham has been retained in numerous expert witness and consulting engagements both nationally and internationally, involving cases such as theft of trade secrets and fraud investigations. His Master of Science in Forensic Computing from Cranfield University, along with certifications such as Certified Forensic Litigation Consultant and Certified eDiscovery Specialist, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving digital forensics and information governance.
Principal Scientist
Wayne B. Norris, Principal Scientist is a Computers and Technology expert specializing in digital forensics, software development, and technology business valuation. With a career spanning management, scientific research, and engineering, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating digital forensics, assessing software compliance, and evaluating technology valuations. Mr. Norris has been retained in numerous expert witness and consulting engagements across the United States, involving digital forensics, software copyright infringement, and aircraft crash investigations. His Bachelor of Arts in Physics, along with certifications such as Microsoft Certified Professional, Project Management Professional, and Certified SCRUM Master, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving technology and software development.
Ph.D, PMP
Jihye Kim (Hanson), Ph.D, PMP is a chemical engineering expert specializing in product liability and safety, patent disputes, and toxicology. With a career spanning product development, chemical safety, and intellectual property across the oil & gas, water treatment, and agriculture sectors, she brings a multidisciplinary perspective to her litigation work. Her work centers on investigating product failures, assessing chemical exposure risks, and evaluating whether regulatory compliance was met. Ms. Kim has been retained in numerous expert witness and consulting engagements across the United States, involving cases in the oil & gas, water treatment, and agriculture industries. Her Doctorate in Chemical Engineering from Texas Tech University, along with her Project Management Professional (PMP) Certification, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving chemical safety and product liability.
Snow Sports Expert and Consulting
Randy Wall, PE, MPA is a snow sports safety and risk management expert specializing in litigation involving skiing, sledding, snow tubing, and winter sporting activities. With a career spanning snow sports industry operations, civil engineering, and regulatory compliance, he brings a multifaceted perspective to analyzing liability and operational standards in snow sports-related cases. His work centers on investigating snow sports risk management practices, assessing ski area operations, and evaluating whether industry standards of care have been met. Mr. Wall has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to snow sports facilities, safety practices, and ski area operations. His Master of Public Administration in Public Administration, along with certifications such as Level 1, 2, & 3 Certified Telemark Ski Instructor and USSA Certified L100 Race Coach and Official, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving snow sports safety and risk management.
Forensics Engineer | Continuum Mechanics Expert | National Security Technologist
Jaton N. Wince, Ph.D. is a forensic engineering expert specializing in mechanical failure analysis and biomechanics of traumatic injury. With a career spanning aerospace, defense, and computational science, he brings a multidisciplinary engineering perspective to litigation work. His work centers on investigating mechanical and materials failures, assessing blast-structure interactions, and evaluating whether engineering standards were met in complex technical disputes. Dr. Wince has been retained in numerous expert witness and consulting engagements across the United States, involving gas explosions, structural damage, and mechanical system failures in residential, commercial, and industrial contexts. His Ph.D. in Engineering, along with certifications such as Level III DAWIA in Systems Planning and ASME Geometric Dimensioning and Tolerancing Professional Certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving forensic engineering and mechanical failures.
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