Automotive Expert Witnesses: 19

Steven S. Paul, the owner of TDT, is a Mechanic and Automobile Expert responsible for all aspects of the business including marketing, operations, and accounting as well as customer service. He has over 25 years of experience in automotive service, heavy equipment maintenance, and inspection services. 

Mr. Paul is ASE Master Certified in both Automotive and Medium / HD Trucks including engines performance, electrical, driveline, brakes, steering, and suspension as well as safety-related systems. He has inspected over 2,500 vehicles since 2005 ranging from Model T Fords to 2021 BMW & Mercedes. He is qualified to inspect HD Semi Trucks and Construction Equipment as well as RV, Motorhomes, and Campers. Mr. Paul also has inspection experience with Exotic & Luxury High-End Cars as well as Boats and Watercraft. automobile, medium-duty, and heavy-duty truck repair and inspection as well as heavy equipment such as construction and agriculture equipment.

Litigation Support - Mr. Paul is a Certified Vehicle Appraiser and can provide opinions of value based on fair market value, diminished value, and replacement values in accordance with USPAP.  He has been court qualified as an expert vehicle inspector in multiple states as well as federal court. 

Mr. Paul has provided over 500 expert witness reports, provided over 30 depositions, and testified in court over 10 times. He is willing to travel to all 50 states. He has experience in:

 Lemon Law - Misrepresentation and Dealer Operations - Lease Return Inspections - Vehicle Condition Reports

Areas of Expertise:

New Car Used Car Classic Cars Exotic Cars Luxury Cars Motor Homes Coaches

Heavy Duty Trucks Semi Trucks Semi Trailers Heavy Duty Equipment Construction Equipment Farm Implements Farm Equipment

Thomas J. Lepper has over sixteen years of experience as a consultant, inspector and tester within the automotive industry. He has more than ten years of experience as a forensic automotive consultant for nationally known insurance companies and law firms. Mr. Lepper is qualified to testify as an Expert Witness in the Superior Court for the State of California.

Areas of Expertise:

• Tire and Brake Separations and Failures
• Theft and Forced Entry Issues
• Fire Cause and origin
• Transmissions
• SDM Interrogation with CDR Tool
• Steering and Suspension Systems
• Seat Belt and Airbag Issues
• Mechanical Defects
• Throttle / Unwanted Acceleration Issues
• Wiring and Electrical Issues
• Racetrack / Racecar Incidents

Mr. Lepper's forensic, automotive fire, brake and tire expertise has been performed for major nationwide insurance companies, nationally known rental car companies and law firms. Please contact for fee schedules.

Dan W. Wall, BSME, specializes in the fields of Accident Reconstruction, Biomechanics and Motor Vehicle Injury Causation, Human Factors, and Injury Prevention in Motor Vehicle Design. Mr. Wall is fully accredited with ACTAR (Accreditation Commission for Traffic Accident Reconstruction), ACTAR No. 1140.

Dan Wall has conducted scientific and engineering analysis of motor vehicle collisions since 1987 for both plaintiff and the defense in civil and criminal cases. A qualified expert witness since 1987, he has offered litigation support services to insurance companies and attorneys in Arizona, California, Colorado, Tennessee and Louisiana and has testified in both Civil and Federal Courts.

Mr. Wall's past cases have involved commercial vehicle design and analysis, insurance investigations, low speed collisions and injury analysis, motorcycle collisions and rider analysis, vehicle handling and dynamics, seat belt analysis and injury mitigation, tire failures and rollover analysis, general accident reconstruction, and roadway analysis. He has conducted human factor analysis including reaction and perception, environmental effects, and general driver behavior. With a large library and the tools needed to do all types of motor vehicle reconstruction investigations, Mr. Wall is an asset to any team.

Dan Wall currently owns and rides a Harley Davidson Ultra Electra Glide Classic motorcycle and has gone through various levels of motorcycle training. He also has extensive experience as a boat operator and Marine Instructor.

For more information, visit www.wallaccidentreconstruction.com

Also view Dan Wall's article in Attorney At Law Magazine at http://attorneyatlawmagazine.com/phoenix/2014/01/17/accident-reconstruction-expert-dan-wall/

Areas of Expertise:

Mechanical Engineering Biomechanics Human Factors Accident Reconstruction Failure Analysis Forensic Investigation Motor Vehicle Design Dynamics and Handling Motorcycles Commercial Vehicles Rollovers Signage

Conspicuity Low Speed Collisions Marine Safety Bicycles Slip and Fall Accidents Pedestrians Accidents Tire Failure Seat Belt Issues Road Defects Off Road Driving Accidents Construction Zones Product Liability

View Dan Wall's Consulting Profile.

Erik Roeder has 40 years of troubleshooting, repair and maintenance of mechanical and electrical issues including Automotive, RV, Light Truck, and Marine. He provides a combination of hands-on work along proven forensic skills.  As an expert witness, his cases ldeal with Mechanical; Electrical; RV Systems and Envelopes; Vessel Propulsion; Systems; and Post Incident/Post Repair Inspections. Erik's opinions and testimony have served plaintiffs and defendants state and federal courts.