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Automotive - Vehicular Accident Reconstruction Expert Witnesses

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Matthew Warren
Main Contact
Mail: PO Box 1608
Visit: 7805 Saint Andrews Road
Irmo SC 29063
USA
phone: 888- 827-7823 / 803-732-6600
fax: 803-732-7576
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Warren Forensic Engineers and Consultants, founded in 1997, is extremely well versed in the disciplines of Mechanical, Electrical, Chemical, Structural, and Fire and Explosion investigation. Their engineers are known for delivering the truth — origin, cause, responsibility, and cost of an event or claim — with unmistakable clarity. Warren Forensics provides technical investigations and analyses of personal injury and property claims as well as expert testimony for insurance adjusters and attorneys. Each member of their engineering team is a licensed professional engineer (P.E.) in multiple states. Beyond engineering expertise, their engineers and consultants also hold a variety of other certifications including Certified Fire and Explosion Investigator, Certified Vehicle Fire Investigator, Certified Fire Investigation Instructor, CMSE®-Certified Machine Safety Expert, Certified Safety Professional, Certified Building Inspector, and Certified Property and Evidence Specialist. 

Types of Loss:

  • Chemical: Ammonia - Confined Space - OSHA
  • Collision: Animal - ATV - Automotive - Bicycle - Farm Equipment - Motorcycle - Pedestrian - Truck
  • Commercial: Construction Defects - Construction Related Losses - Electrical and Control Systems - Liability Claims - Lightning Damage - Mechanical Systems - Roofing - Slip, Trip and Fall - Structural - Water Damage - Workplace Injuries
  • Fires and Explosions: Boiler - Commercial - CSST - Dust Explosions - Electrical - Fire Protection Systems - Industrial - LP and Natural Gas - Machinery and Equipment - Marine - Residential - Spontaneous Combustion - Structural - Vehicle and Mobile Equipment - Welding and Hot Work
  • Industrial: Boilers and Pressure Vessels - Construction Defects - Construction Related Losses - Cranes, Hoists, Lifting and Rigging - Electrical and Control Systems - Industrial Process Equipment - Liability Claims - Lightning Damage - Machinery and Equipment - Material Handling - Mechanical Systems - Roofing - Slip, Trip and Fall - Structural - Water Damage - Workplace Injuries
  • Inland and Ocean: Boilers and Pressure Vessels - Bulk Material Handling - Cargo Damage Assessment - Cargo Handling - Cranes, Hoists, Lifting and Rigging - Docks and Piers - Machinery and Equipment - Marinas - Marine Collisions - Marine Fire Protection Systems - Marine Liability Analysis - Mechanical and Electrical Systems - Slip, Trip and Fall - Workplace Injuries
  • Residential: Construction Defects - Construction Related Losses - Electrical Systems - Lightning Damage - Mechanical Systems - Roofing - Slip, Trip and Fall - Structural - Water Damage
  • Subrogation: Consumer Products - Electrical - Fire and Explosions - Machinery and Equipment - Workers’ Compensation
  • Catastrophic: Earthquake - Flood - Freeze, Ice and Snow - Hail Storm - Hurricane - Tornado - Wildfire - Wind Storm and Wind Shear

Featured Experts:

7/17/2018
Event Data Recorders (EDRs) were first introduced by General Motors (GM) in 1974. That data was only available to GM; however, since 1994 more and more vehicle EDR’s have recorded data that can be gathered. The data captured can be imaged and is being used by vehicle manufacturers, law enforcement officers, and collision reconstructionists to better understand what is happening in a collision. In accident investigation, EDRs have the potential to provide independent measurements of crash data that would elsewise be estimated by reconstruction methodology.

6/27/2018 · Corrosion
When thinking about the safe operation of boilers (and don't we all?), several systems can readily be named; flame control, fuel/air ratio; steam pressure control, levels in the vessel, etc. What about the water? It seems so passive, as long as there is enough for level control, what's the big deal? Well, it turns out, that as the steam produced by a boiler is used in the process, the condensate from that steam is returned to the boiler as feedwater. However, since 100% of the condensate is not returned, whatever solids had been in that water before it evaporated to form steam are left in the remaining water. Fresh feedwater is added to maintain levels, but even fresh water contains some dissolved solids. So over time, the water in the boiler system gets saturated with all sorts of dissolved minerals.

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Aaron (Al) L. Duncan II, ACTAR
Vehicle Collision Reconstructionist
Mail: PO Box 1608
Visit: 7805 Saint Andrews Road
Irmo SC 29063
USA
phone: 888- 827-7823 / 803-732-6600
fax: 803-732-7576
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Aaron (Al) Duncan II, ACTAR, is a Vehicle Collision Reconstructionist with Warren. He is accredited as a Traffic Accident Reconstructionist by The Accreditation Commission for Traffic Accident Reconstruction. 

Background Experience - Prior to joining Warren, Mr. Duncan worked for 23 years as a South Carolina Highway Patrol Trooper to include 10 years as a Multi-Disciplinary Accident Investigation Team (M.A.I.T.) member. As a trooper, he investigated in excess of 1,000 vehicle accidents and incidents. Then, as a member of M.A.I.T. for 10 years, he was involved in over 1,000 detailed investigations and collision reconstructions. Mr. Duncan is a member of the South Carolina Association of Reconstruction Specialists (SCARS), the International Association of Accident Reconstruction Specialists (IAARS), and the Blue Knights International Motorcycle Group. He holds a Bachelor of Science Degree in Political Science from Lander University in Greenwood, South Carolina and completed the Law Enforcement Basic Program at the South Carolina Criminal Justice Academy in Columbia, South Carolina. 

Mr. Duncan has testified multiple times in state courts and he has been court qualified as an expert in accident investigation and collision reconstruction. His expertise focuses on investigating and reconstructing vehicle collisions involving single and multi-vehicles, animals, pedestrians, motorcycles, heavy trucks, and commercial vehicles. Mr. Duncan is also a skilled user of Forensic Mapping Technology and Computerized Collision Diagramming Software for collision scene analysis. He is experienced in the data download and analysis of airbag black boxes (Crash Data Retrieval Units) in automobiles, pickup trucks, and SUVs. 

Areas of Expertise:

  • Crash Data Retrieval
  • Forensic Mapping Technology
  • Vehicle Collision Reconstruction
7/17/2018
Event Data Recorders (EDRs) were first introduced by General Motors (GM) in 1974. That data was only available to GM; however, since 1994 more and more vehicle EDR’s have recorded data that can be gathered. The data captured can be imaged and is being used by vehicle manufacturers, law enforcement officers, and collision reconstructionists to better understand what is happening in a collision. In accident investigation, EDRs have the potential to provide independent measurements of crash data that would elsewise be estimated by reconstruction methodology.

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Roger Davis, PE, CFEI
Senior Consulting Engineer
Mail: PO Box 1608
Visit: 7805 Saint Andrews Road
Irmo SC 29063
USA
phone: 888- 827-7823 / 803-732-6600
fax: 803-732-7576
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Roger Davis, PE, CFEI, Senior Consulting Engineer, is a Licensed Professional Engineer in South Carolina, North Carolina, Alabama, Georgia, and Mississippi. Mr. Davis holds a Bachelor of Science in Mechanical Engineering and a Master of Business Administration from the University of South Carolina. He also has a certificate in Crane Safety from the Georgia Institute of Technology, Distance Learning and Professional Education Center as well as certificates in Fire and Explosion Investigation and Vehicle Fire Investigation.

Mr. Davis is experienced with municipal water, sanitary sewer, and storm water system design, construction, and operations. His expertise also includes property damage and personal injury investigations involving municipal utilities. Mr. Davis is an accomplished gas and diesel engine mechanic and has more than 30 years of experience with hydraulic plumbing and piping issues. He gained practical experience in hydraulics, fluid flow, tanks, and material handling with the South Carolina Department of Health and Environmental Control (DHEC) and Laidlaw Environmental Services, Inc., the largest hazardous and industrial waste firm in North America. He also gained experience in industrial operations as a Manufacturing Engineer.

Roger Davis has investigated claims and injuries ranging from pressure piping system failures and material and personnel handling equipment to large engine failures and fires involving machinery, generators and vehicles.

Areas of Expertise:
  • Aerial Lifts
  • Failure Analysis
  • Industrial and Accident Reconstruction
  • Machine Safeguarding
  • Products Liability Vehicle
  • Mechanical Failure
  • Water and Sewer Systems
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    44648 Mound Rd.
    Suite 174
    Sterling Heights MI 48314
    USA
    phone: 248-408-7981
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    Douglas J. Van Sweden, PE, is a Mechanical Engineer with over 45 years of experience in the automobile industry, including 20 years with the General Motors Corporation.

    Litigation Support - Since 1997, Mr. Van Sweden has been providing insurance companies, legal firms, and manufacturers with the objective, scientific research to clearly define what really happened, for the cost-effective answer. The facilities, equipment, training, and commitment to continuing education allow him to find and assemble the critical missing pieces in Accident Reconstruction cases. He painstakingly reconstructs events so the end picture will be the accurate and defensible answer to what really happened.

    Mr. Van Sweden's services are available to attorneys representing plaintiff and defendant and include site review, record review, thorough reports, depositions, and trial testimony as needed.

    Vehicle Expertise:
    • Cars
    • Trucks
    • Motorcycles
    • Boats
  • Recreational Vehicles
  • Bicycles
  • Personal Watercraft
  • Non-Transportation - Elevators, Hoists:
    • Vehicle Systems and Structures
    • Vehicle Design
    • Seat Belt and Airbag Restraint Systems
    • Interior Components
    • Fuel Systems
    • Electrical Systems
    • Cooling Systems
    • Exhaust Systems
  • Drive Trains
  • Brakes
  • Suspensions
  • Steering
  • Body
  • Corrosion
  • Crash Testing
  • Fires and Explosion Cause / Origin
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    Thomas Lepper
    810 Rose Drive
    Benicia CA 94510
    USA
    phone: 408-691-2779
    fax: 707-751-3833
    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.
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    TechRecon, Inc.
    Charles R. Lewis
    Traffic Accident Reconstructionist
    3377 Bethel Rd., SE
    Suite 107-273
    Port Orchard WA 98366
    USA
    phone: 360-876-3919
    fax: 360-876-3926
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    Charles R. Lewis, President at TechRecon, Inc., is a Traffic Accident Reconstructionist accredited by the Accreditation Commission for Traffic Accident Reconstruction (ACTAR) in 1993.

    Mr. Lewis has been analyzing collision data and reconstructing traffic accidents for over 30 years. As a former Adjunct Instructor at the Texas Engineering Extension Service of Texas A&M University System, he was responsible for developing and presenting Traffic Accident Reconstruction course curriculum.

    Mr. Lewis' company, TechRecon Inc. (formerly Technical Collision Reconstruction), was one of the first accident traffic reconstruction companies in the nation to begin using Engineering Dynamics’ collision speed analysis and collision simulator software to analyze and reconstruct traffic collisions.

    TechRecon, Inc. is equipped with Engineering Dynamics HVE 3d collision speed analysis and three-dimensional collision simulation software. This software permits the detailed study and analysis of:
    • Passenger Car, Pickup Truck, and SUV Collisions and Rollovers
    • Heavy Truck Collisions and Rollovers
    • Motorcycle, Pedestrian, and Bicycle Accidents
    • Vehicle / Trailer Combinations Dynamics Analysis
    • Human Kinematics Analysis
    They are also equipped to conduct Crash Data Retrieval from Airbag Control Modules.

    Litigation Support - Mr. Lewis is individually qualified as a traffic collision reconstruction expert witness in Superior, District, and Federal Court for both criminal and civil matters. His services are also available for arbitration hearings and other administrative hearings.

    Mr. Lewis has testified at depositions and offered pre-trial consultations regarding virtually every aspect of traffic collision reconstruction. As a consultant and expert witness, he has prepared reconstructions for attorneys representing a wide variety of clients, from individuals to automobile manufacturers, insurance companies to County District Attorney’s offices in Washington, Alaska, and Oregon since 1985.
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    Dr. Irving Ojalvo
    Managing Partner
    137 E. 36th Street, Suite 7K
    New York NY 10016
    USA
    phone: 800-358-9909
    fax: 888-358-9901
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    Additional Locations
    New England Offices:
    1011 High Ridge Road
    Stamford, CT 06905


    Forensic Engineering: We have a highly qualified team of Mechanical, Biomechanical, Electrical and Civil engineers, most of whom hold doctorates or other advanced engineering degrees from top universities. Our engineers have hundreds of publications, and are active in safety and accident research. Over the past decades, our engineers have helped thousands of attorneys and others pursue their cases.

    Selected Areas of Expertise:Degrees/Licenses: BS, MS, MA, PhD, ScD, PE
    Airbags are credited with reducing numerous injuries and saving many lives during vehicle accidents. However, there have been incidents where they do not function as intended, and have even caused injuries such as explosive powder burns, detached eye retinas, child suffocation and impact deaths.

    Animations are useful visual tools that can help jurors understand how an incident could, or could not, have occurred. Simply describing an event in court, or showing still pictures, may be insufficient to explain a complex sequence of events.

    Biomechanics is the application of mechanics to the interaction of biological systems with their external environment. When investigating an accident, biomechanical analysis can be used to reconstruct a victim’s motion and relate it to his injuries.

    When an understanding of complex motions associated with various accidents is required, computer simulation is an invaluable tool, which allows the modeling and visualization of rollovers and collisions. In addition to vehicle accidents, computer simulation can also be used to create many other systems of masses and contacting surfaces, such as a toppling light pole after it has been struck.

    Construction sites and equipment present many hazards if proper care is not taken. The space in and around a construction site is often filled with potentially dangerous, high-powered equipment capable of delivering high forces.

    Doors and gates, whether automated or manual, can pose a serious hazard to users if not designed, manufactured, installed and maintained properly. The different types include automatic doors, overhead garage doors, elevator doors, sliding doors, swinging doors, and automatic gates.

    Electric fires are becoming more common as appliances and electric feeds are used more and more in our daily lives. Like other fires, the root cause of an electric fire is the introduction of heat, oxygen, and fuel.

    Electric power and electronic appliances are so integrated with modern life that there is a high degree of likelihood that everyone will receive one or more electric shocks in a lifetime. In many cases, only trivial power levels are involved.

    Second only to automobile accidents, falls are the leading cause of injury and deaths. Of these, accidents due to slipping or tripping form a large proportion. Slips and trips occur on floors, streets, walkways, stairs, etc.

    Forklifts, industrial trucks, skid steer loaders, bobcats and other similar material-handling machines are often difficult to maneuver and susceptible to a wide range of accidents. Their nature exposes operators and nearby co-workers to falling loads, crushing hazards and lading dock falls.

    There are roughly 9,000 golf cart related accidents requiring emergency room treatment in the United States each year. The majority of these accidents are related to either braking, cart rollover or passenger ejection. These problems are common to golf carts due to their open design, lack of seatbelts, poor braking capabilities and the uneven terrains they are driven on.

    The primary function of all guarding is to prevent an operator or bystander from being injured by a potentially dangerous portion of a machine. Often the hazard involves moving parts with the potential to cut, crush or draw-in body parts, although barrier guards may also be necessary when electrical, thermal or chemical dangers are present.

    Human Factors and Ergonomics (HFE) is a branch of science, which is concerned with man’s interaction with his universe. Thus, it is not simply the study of pure science (e.g. sound or light), but rather man’s understanding and reactions (e.g. to hear and see).

    There are over 100,000 ladder accidents annually in the U.S. requiring hospital emergency room treatment. Although many of these result from user misuse, such as an improper extension ladder lean angle against a wall causing it to slip outward, use of a damaged ladder, or failing to lock a step ladder’s spreaders, many ladders fail due to design or manufacturing defects.

    Motorcycles, like passenger cars, are capable of high speeds and must share the road with other vehicles. However, unlike passenger cars, motorcycles are capable of rapid accelerations, offer little protection to the operator during a collision and require special skills to maneuver effectively.

    In many vehicle accident investigations, it is necessary to know not only the speeds and motions of the vehicles involved, but the causes of injuries suffered by their occupants as well. Such investigations seek to answer questions regarding occupant ejection, effects of seatbelt use, airbag deployment and body-interior impacts.

    Parking lots are the scene of many pedestrian accidents because of the close proximity of people and cars and the confusing traffic patterns that sometimes exist. In addition to pedestrian-vehicle collisions, many trip and fall accidents occur in parking lots as well.

    Though swimming pool accidents are sometimes the result of reckless participant behavior, they can also be caused by inadequate supervision, warnings, structures, or defective pool design. Structures commonly found in or near swimming pools include slides, ladders, diving surfaces and fencing.

    Approximately 125,000 serious injuries occur in the US each year related to the use of portable and fixed power saws. Lacerations and similar injuries, such as abrasions and avulsions, account for over 90% of these, which generally occur to males and result in losses in the tens of millions of dollars annually.

    An end user of a product expects that a given product will not only function as intended, but will be safe from non-obvious hazards. Based upon decades of experience with mishaps during use of common and specialized equipment, thousands of standards have been developed for many consumer products and industrial equipment. Numerous organizations exist, e.g., ANSI, ASTM, SAE, and ASME, that regularly review and update these standards.

    Places of business, residences, parking and recreational areas contain potential accident sources such as slippery floors and stairs, product displays, automatic doors, ledges, railings, elevators, escalators and other hazardous items. To prevent such items from causing injury to the public, premises owners and their agents have a responsibility to recognize unsafe conditions and exercise reasonable care to maintain or make conditions safe, or warn the public of the risks involved.

    Supermarkets, pharmacies, home improvement, and department stores expose their customers to many potential accident sources such as floors and aisles, which can become unsafe, and display merchandize that can topple or cause tripping. To prevent such accidents from occurring, these establishments should maintain routine scheduled inspections to insure that unsafe conditions are detected and corrected before accidents occur.

    In many vehicle rollover investigations, it is necessary to know not only the speeds and motions of the vehicles involved, but the causes of injuries suffered by their occupants as well. Such investigations seek to answer questions regarding occupant ejection, effects of seatbelt use, roof crush and body-interior impacts.

    Motor vehicle seatbelt use provides highly effective protection in frontal collisions for impact angles up to 30 degrees off-center (i.e. between 11 and 1 o’clock). All states have laws requiring their use for front seat passengers, as they have been shown to reduce moderate to severe injuries by 50%. They are less effective when your car is hit in the rear or side and sometimes their locking devices malfunction or the anchorage gives way.

    Recreation, sports, and gym equipment are subjected to large dynamic forces and must be designed to support these loads and protect users from unintentional hazards. Adequate instructions and warnings may be required if their assembly and proper use are not obvious.

    Codes and standards specify criteria necessary to ensure that a product, material or process will consistently and safely perform its intended function. Although standards provide minimum design requirements, conforming to a standard is not always sufficient in preventing an accident.

    Structural failure can often produce catastrophic results. In many cases, the damage seen after the accident is not indicative of the cause of the initial failure. Fortunately, based on physical evidence, an investigator can frequently determine how and why a structure failed.

    Heavy trucks, whether tractor-trailers, construction vehicles or garbage haulers, are involved in many serious traffic accidents due to their large weight, high centers of gravity, decreased visibility, poor handling and reduced braking efficiency. In addition, articulated tractor-trailers are subject to additional problems such as jack-knife and trailer sway instabilities.

    Motor vehicle accidents are the most common type of incidents producing injury in the US. The main issues in litigating automotive accidents involve vehicle speeds, seatbelt usage, airbag deployment, vehicle component failure (e.g. steering, braking), roadway design, occupant biomechanics, rollover, visibility, etc.

    A person’s interaction with his environment comes largely from visual cues. Without this information, a pedestrian can trip over an unseen object or a driver might not detect a dangerous situation. In order to avoid these hazards, a person requires adequate lighting and should be provided with appropriate illumination for a given task.

    A warning must inform individuals of a danger, which would not be obvious to them. It must tell them how to avoid the danger, and be easily understood. It should also provide them with the consequences of not heading the warning.

    A car is stopped for a light when it is unexpectedly rear-ended causing little or no damage to either vehicle. Nevertheless, the passengers of the struck vehicle complain of neck, shoulder and back pain. Insurance claim representatives, attorneys, medical, engineering and biomedical experts are then brought in and various conflicting allegations, testimony and opinions are expressed.

    Pedestrian and bicycle accidents in the United States result in approximately 80,000 and 50,000 injuries each year, respectively. Though pedestrians and bicycles move differently, they share important characteristics as both have little protection during a roadway collision with a motor vehicle.

    7/14/2009 · Human Factors
    A standard can be defined as a document issued by a recognized agency, and dealing with design and/or safety requirements relating to a specific product or type of activity. Such agencies include the U.S. Occupational Safety and Health Administration (051-IA) and the American National Standards Institute (ANSI). OSHA standards are generally legally binding for an employer, while ANSI standards are generally of an advisory nature. The term "industry standard," however, is ordinarily taken to have a broader meaning, including formal standards as just defined, and also including designs and procedures not required in formal standards, though prevailing in a specific industry, and which represent generally accepted custom and practice.

    7/14/2009 · Forensic Analysis
    Persons with no training in engineering are generally unaware of the nature of engineering analysis, and so tend to assume that testing, as a means of determining the causation of accidents, is a dominant tool of the engineer. In the following examples, we shall undertake to explain the nature of engineering analysis, and to show that it is more basic than testing because testing without analysis is meaningless. Further, while analysis is always necessary in accident reconstruction, testing is only sometimes necessary.

    There are approximately 180,000 lawnmower accidents per year. In this introductory presentation, we undertake to describe the various ways in which these accidents occur.

    7/14/2009 · Forensic Analysis
    Second to automobile accidents, accidents due to falls are the leading cause of injury and death. Of these, accidents due to slipping (not tripping) form a large proportion. Slipping may occur on floors, walkways, and stairs or steps. For Introductory purposes, however, the present discussion will be limited to slipping on flat surfaces such as a floor or sidewalk.

    7/14/2009 · Human Factors
    When a person becomes aware of a dangerous situation, a time-interval must elapse before he can take defensive action against it. This time interval, commonly called the reaction time, has been found to be about 0.7 second for all normal persons, regardless of their background and training. This suggests that the reaction time depends on some basic aspect of the human physiology-involving the brain, nervous system, and muscles-which does not vary much from person to person.

    A car is stopped for a light when it is unexpectedly rear-ended by a vehicle from behind. It is not a hard impact and there is little or no damage to either vehicle, because the energy absorbing bumpers have protected them. Nevertheless, the passengers of the struck vehicle complain of neck, shoulder and back pain. The next day they allegedly experience even greater pain and visit a medical person who claims that they have been injured. Insurance claim representatives, attorneys, medical, engineering and biomedical experts are then brought in and various conflicting allegations, testimony and opinions are expressed. Do we have a legitimate injury claim on our hands or a situation of fraud?

    7/14/2009 · Forensic Analysis
    Accident reconstructionists are often called on to determine the distance that a car, covers while being braked to a stop. Conversely, the reconstructionist may be given information as to the length of the skidmarks left by a car on the roadway, and may be asked to determine how fast the car must have been going at the beginning of the skid. An expert can accomplish this with considerable accuracy, based on a knowledge of the physical principles that are involved, plus available information relating to the friction of tires on various types of road surfaces.

    7/14/2009 · Forensic Analysis
    According to the Consumer Products Safety Commission (CPSC), there are approximately 10,000 golf car related injuries requiring emergency room treatment in the US each year. One significant mode of injury in golf car accidents is passenger ejection, which can lead to serious injuries, especially of the head. Based on CPSC statistics, roughly 35% of golf car accidents involve a person falling out of the car. In addition to ejection accidents, at least 10% of golf car accidents involve a rollover and statistics indicate that such accidents are roughly twice as likely to lead to injuries requiring a hospital stay as non-rollover accidents.

    7/14/2009 · Forensic Analysis
    According to Consumer Product Safety Commission (CPSC) accident estimates, tens of thousands of stepladder accidents requiring emergency room treatment occurred annually in the United States. Approximately 85-90% of these accidents involve the user falling from the ladder and 8-9% of these injuries are serious enough to require that the victim be admitted to a hospital. In addition to posing a severe health concern, these accidents have significant loss-of-wages and high medical expense implications.

    11/30/2005 · Expert Witnessing
    Participation of the proper automotive expert in a personal injury lawsuit can govern its success. This article develops four basic principles to optimize their use, while minimizing their cost, and describes some important techniques used by the accident reconstructionist

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    Tau Max Engineering
    William H. Pultar, BSME - ACTAR
    28 Berthel Lane
    Pelham NH 03076
    USA
    phone: 9787355226
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    William Pultar Human Factors Expert PhotoWilliam H. Pultar, BSME, ACTAR, is a Mechanical Engineer with over 20 years of experience in the field of Event Data Recording, Accident Reconstruction, and Human Factors.

    Background Experience - Employed by the Massachusetts State Police for several decades, Mr. Pultar's duties have included the investigation of line of duty injuries, citizen complaints, cruiser crashes, and the use of force incidents. As Section Supervisor for the Northeast Team of the C.A.R.S. unit, he was responsible for the training of the Northeast Team members in newer aspects of total station technology and was consulted numerous times on the kinematics of motor vehicle crashes by the Essex, Middlesex, and Hampshire District Attorney’s Offices.

    Promoted to Lieutenant in 2010, Mr. Pultar was responsible and accountable for the supervision of A Troop personnel and the oversight of a geographical area that covers the northeast corner of Massachusetts and, as SCO, was put in charge of large high risk NIMS and crime related incidents such as the 2012 Beverly homicide and the Boston Bombing incidents.

    Litigation Support - While employed by the Massachusetts State Police, Mr. Pultar testified numerous times in Federal District, Massachusetts Superior, and District Courts as an expert in the kinematics, kinetics of motor vehicle crashes, and human factors involving crashes, and as an expert in the electronic imaging of Crash Data Recorders. His services are available to counsel representing both Plaintiff and Defendant.

    Areas of Expertise - William Pultar's expertise is in the Extraction of Electronic Data from Commercial Vehicle Engine Control Modules (CVEDM), motor vehicle crash data (CDR), restrain control module (RCM) and engine control modules (ECM) for all “supported vehicles. He currently has the only privately owned Hyundai and Kia download kits in New England. All of these modules are commonly referred to as vehicle “black boxes,” although they are NOT black boxes.

    Mr. Pultar also specialized equipment to measure Luminance (NOT illumination), electronic survey crash scene, and measure acoustical data (sound energy), such as backup alarms, sirens, etc.

    View William Pultar's Consulting Profile.
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    David G. Curry, PhD, CHFP, CSP
    420 N. Main Street
    Montgomery IL 60538
    USA
    phone: 630-701-7703 (Office) 630-740-6871 (Cell)
    fax: 630-701-7732
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    David G. Curry, PhD, CHFP, CSP, is part of Solution Engineering Group, which has experts representing a wide variety of engineering and scientific disciplines. Each have the ability to work as a team, matching your needs with the right Expert.

    Dr. Curry consults on all aspects of Human Factors, Applied Human Performance, Ergonomics, and Safety. He has over 30 years of experience working in accident investigation, product design and development, operational testing and analysis, and both laboratory and field research in the control / display, aviation, and surface vehicle arenas.

    Dr. Curry holds graduate degrees in Experimental, Human Factors, and Cognitive/ Perceptual Psychology, Industrial Engineering, and Business. He retired as a Lieutenant Colonel from the Air Force Reserve, where he worked with the Air Force Research Laboratory in the area of display technologies, aircrew training, and pilot-vehicle interfaces.

    Litigation Support - Dr. Curry is recognized as an expert in operator-vehicle interaction, and is both a Certified Human Factors Professional and Certified Safety Professional. He holds several patents and has or does serve as a member of national standards-making committees for a variety of organizations (e.g., ANSI, ASTM, and SAE.) Dr. Curry has provided expert testimony in both State and Federal courts.

    Areas of Particular Expertise:
    • Human / Machine Interface Design and Evaluation
    • Human Capabilities and Limitations in Applied Environments
    • Industrial Ergonomics
    • Instructions and Warnings
    • Perception / Vision / Visibility
    • Slips / Trips / Falls
    • Evaluation of Equipment / Facilities / Structures from a Human Use Standpoint
    • Safety-related Issues in General
    View Solution Engineering Group's Consulting Profile.
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    Scott L. Turner

    Two Office Locations. See Below.
    NJ, TN USA
    phone: NJ: 908-496-4273 / TN: 423-881-5469
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    Scott L. Turner is a highly qualified Commercial Motor Vehicle (CMV) Transportation Expert and HazMat Expert with over 25 years experience in the highly specialized field of CMV crashes and incidents, and 16 years as the CEO of a nationwide CMV crash & HazMat disaster response corporation.

    Mr. Turner's career includes personal response and/or investigation of over 1,000 CMV crashes, 200 cargo-tank truck crashes/incidents and a multitude of industrial setting incidents including fixed facilities, loading docks and loading rack disasters. His FMCSR and PHMSA knowledge, detailed reporting and powerfully delivered testimony can be a focal point of any civil litigation, where commercial motor vehicle crashes and/or transit incidents are at issue, with or without hazmat involvement.

    Areas of Expertise:
  • Level 1 FMCSA inspections
  • Commercial Motor Vehicle (CMV) post crash inspection
  • CMV crash investigation
  • Driver qualifications
  • Safety Programs
  • Trucking industry standards
  • Cargo-tank truck incidents
  • CMV loading/Off-loading cases (van, cargo-tank, flatbed)
  • CMV wreck involving hazmats
  • Loading rack explosions/disasters
  • Services Include:
  • Litigation support
  • Trial preparation consulting
  • Courtroom testimony
  • Commerical vehicle accident investigation
  • NIMBY hazmat
  • Highway construction zone incidents
  • CMV loading and offloading investigation
  • Level 1 FMCSA audits
  • Load securement incidents
  • New Jersey Office:
    PO Box 185
    Blairstown, NJ 07825
    Tennessee Office:
    P.O. Box 44
    Specncer, TN 38585
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    Dr. J. Rasty, PE, MBA
    President & CEO
    2309 19th Street
    Lubbock TX 79401
    USA
    phone: (806) 368-9811
    fax: (806) 368-9812
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    Since 1988, Real-World Forensic Engineering, LLC ("RWFE") has provided engineering services to industries and government labs, as well as litigation support to both plaintiff and defense attorneys practicing in many areas.

    RWFE Expertise Includes:

    Components & Machinery
    Metallurgy & Corrosion
    Dynamics of Impact & Collisions
    Friction Analysis / Slips, Trips and Falls
    Intellectual Property & Patent Review
    Accident Reconstruction / Animation
    Computer Aided Design
    Education & Training
    Electrocution & Switch Malfunction
    Grounding & Lightning Protection
    Lightning Impulse Testing
    Products and Premises Liability & Safety
    High-Voltage & Current Power Systems
    Bridge Design and Safety
    Fire & Explosion Cause and Origin
    And Much More...


    At RWFE, we proudly distinguish ourselves by our Four C's:

    CREDENTIALS. COMPETENCE. CREDIBILITY. COMMUNICATION.

    Credentials:B.S., M.S., M.Eng., M.B.A., J.D., and Ph.D. Degreed
    Licensed Professional Engineers in Mechanical, Electrical, and Civil Engineering
    Tenured University Professors and Professionals
    NAFI Certified Fire and Explosion Investigators (CFEI)
    Licensed Master Electricians
    Competence:Over 80 Combined Years of Experience in Engineering R&D, Industry, Academia, Consulting, and Expert Witness Litigation Support
    Over 120 Combined Deposition and Court Testimonies
    Credibility:Internationally Recognized in Our Areas of Expertise
    More Than $19 Million in Peer-reviewed and Funded Research Grants
    Over 200 Combined Scientific Publications and Journal Articles
    Communication:Over 20 Different Undergraduate and Graduate-level University Courses
    Over 30 Invited Short Courses, Talks, and Lectures

    Design Evaluation – Accident Investigation – Intellectual Property
    Failure Analysis – Fire Cause & Origin – Component Testing
    Computer Aided Drafting – Accident Animation
    Expert Witness & Litigation Support

    www.ExpertEngineering.com
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    Daniel Rapperport
    8 Wallis Court
    Lexington MA 02421
    USA
    phone: 781-862-9001 or 339-222-2822
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    Rapperport Associates, Inc., provides exceptional capability in Failure Analysis, Fire and Explosion Investigation, Accident Reconstruction, Structural Analysis, Mechanical and Electrical Engineering, Metallurgy and Materials Science.

    We have provided superior technical support for litigation since 1974, and possess an extraordinarily talented technical team with impeccable academic and industrial credentials and proven analysis capability. Our team of distinguished scientists and engineers is drawn principally from Massachusetts Institute of Technology (M.I.T.) and Stanford University.

    AREAS OF EXPERTISE:

    Failure Analysis
  • Structural Design Analysis
  • Metallurgical Failures
  • Finite Element Stress Analysis
  • Fracture and Fatigue Analysis
  • Scanning Electron Microscopy
  • Corrosion

  • Accident Reconstruction
  • Automobiles / Trucks
  • Biomechanics / Injury Mechanism
  • Off-Road Vehicles
  • Occupant Motion
  • Aircraft
  • Animation

  • Fire & Explosion Analysis
  • Cause and Origin
  • Electrical
  • Gases, Liquids and Dust
  • Industrial Processes
  • ........Safety
  • Machine and Industrial Safety
  • Machine Guarding
  • Construction Failures
  • Slips, Trips, Falls


  • Engineering
  • Mechanical
  • Structural / Civil
  • Metallurgy
  • Materials Science
  • Aeronautics and Astronautics
  • Electrical
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    T. Kim Parnell, PhD, PE
    Principal
    1150 Kelsey Dr.
    Sunnyvale CA 94087
    USA
    phone: 408-203-9443
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    Medical Devices, Biotech, Failure Analysis, Mechanical Eng, Materials, Reliability, Expert Witness

    Kim Parnell Mechanical Engineer Expert PhotoT. Kim Parnell, PhD, PE is a Professional Mechanical Engineering consultant with strong experience in a number of technology areas. He holds PhD and MSME degrees from Stanford University in Mechanical Engineering and a BES from Georgia Tech. He specializes in the mechanical engineering design and behavior of Biomedical Devices, Superelastic and Shape Memory Metals (Nitinol), Bioabsorbable Polymers, Composites, Fiber-Reinforced Materials, Electronics, and Consumer Products. Dr. Parnell consults actively in these areas using finite element analysis and other advanced technologies to improve designs, to perform failure analysis, and to improve reliability.

    Dr. Parnell served on the Mechanical Engineering faculty at Santa Clara University from 2010-2012 and was previously a Visiting Associate Professor at Stanford University. He lectured in the Stanford Composites Design Program, and is a coach and mentor for the innovative Stanford Biodesign Program. He has worked for companies including MSC Software, Rubicor Medical, Exponent Failure Analysis Associates, SST Systems, ATT Bell Laboratories, Stanford University, and General Motors.

    Dr. Kim Parnell has experience as a medical device patent litigation expert, as an expert in product liability matters (including heavy truck crashworthiness), and frequently serves as an expert witness and litigation consultant. He has testified in both trial and deposition, and has also authored expert reports. Dr. Parnell's litigation support services are available to attorneys for both plaintiff and defense.

    Areas of Expertise:
    • Patents and Intellectual Property
    • Medical Devices
    • Medical Instrumentation
    • Composite Materials
    • Finite Element Analysis (FEA) & Simulation
    • Cell Phones, Personal Electronic Devices
    • Gas Leaks, Pipe Failure, Vapor Cloud Explosions
  • Shape Memory Materials
  • Heavy Truck Crashworthiness
  • Consumer Products
  • Product Design Refinement
  • Piping, Pressure Vessels
  • Failure Analysis
  • Reliability
  • Selected Professional Memberships:
    • Registered Professional Engineer (Mechanical), California
    • ASME (American Society of Mechanical Engineers), Fellow
    • SAE (Society of Automotive Engineers), Member
    • IEEE (Institute of Electrical & Electronics Engineers), Senior Member
    • ASM International, Member
    • SMST (Shape Memory and Superelastic Technologies), Member
    View Dr. Parnell's Consulting Profile.
    Rail residual stress distributions can be complex and variable in nature, as different manufacturing techniques produce varying stress magnitudes and distributions. To evaluate the effect of residual stresses on rail integrity, an analysis technique was sought that could quantify the effect of these stresses on web crack propagation.

    The computer program LS-DYNA3D was used to simulate the behavior of a specific, though representative, heavy truck cab-over tractor-trailer vehicle during a full 180° rollover event. These simulations provide a key component in the development of a physical testing procedure for evaluating structural integrity and occupant crash protection system designs in heavy trucks.

    2/18/2014 · Medical
    The United States Food & Drug Administration (FDA) requirements for Class III implantable medical devices requires a 10 year life, or approximately 400 million cycles of service.

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    Mari S. Truman, PE
    Principal Engineer
    221 N. Union St.
    Waraw IN 46580
    USA
    phone: 574-265-1726
    fax: 866-470-6125
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    Mari S. Truman, PE, has more than 37 years of experience in Orthopedic Product Design and Development. As Principal Engineer with her company, Orthobiomech, LLC, she acts as an R&D design and development consultant to the orthopaedic industry and an injury biomechanics and medical device forensic expert.

    Ms. Truman's design experience includes implants and instrumentation systems used to repair fractured bones, torn ligaments and/or to reconstruct spine, knee, wrist, hip, ankle, elbow, thumb based cmc, and other finger and toe joints for many of the USA based orthopaedic conglomerates and a few Asian, Australian and European firms.

    Having designed and developed implants and instruments used for both human joint reconstruction and skeletal trauma repair, Ms. Truman is named on 12 Orthopaedic Patents and frequently gives talks on implant design and injury biomechanics on topics such as: knee and thumb-based joint surfaces and kinematics, joint design, rapid prototyping, medical device design control, and injury biomechanics.

    Litigation Support - Ms. Truman has been providing Forensic Impact and Injury Biomechanics and Orthopedic Biomechanics to the legal industry for over 15 years. She draws on her strong knowledge of FDA and ISO EN13485 compliant design control processes, failure modes and effects analysis, clinically relevant tissue loading, and design safety assurance, including device performance requirements and warnings, during her medical device litigation reviews. Ms. Truman has a strong knowledge of the production and quality assurance processes used in the manufacture, cleaning, and sterilization of medical devices and the effects of such processes on product performance.

    Analysis of Traumatic Injuries Related To:
    • Falls and Fall Recovery
    • Vehicular Collisions
    • Assaults and Fights
    • Projectile Impacts
    • Occupation or Workplace
  • Failed Medical Implants
  • Assistive Devices
  • Orthotics
  • Consumer Products
  • Sports and Recreation, Occupational Overuse / Injury
  • View OrthoBioMech LLC's Consulting Profile.
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    Mukul Verma, PhD
    Consultant & Professor of Mechanical Engineering

    USA
    phone: 248-971-0705
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    Mukul Verma Vehicle Engineering Expert PhotoMukul K. Verma, PhD in Mechanical Engineering and Applied Mechanics, brings more than 35 years of industrial, academic and R&D experience to his consulting practice. This extensive experience includes various engineering and management assignments in the development and testing of new automobiles at a major manufacturer of vehicles. He has led the implementation of technical advances in multiple fields of vehicle design and automotive safety, some examples being in areas such as - performance of airbag systems, pedestrian’s protection, car-to-SUV crashes, telematics for crash notifications, post-crash protection, heavy truck rollovers, motorcycle handling, etc. During period, Dr. Verma was additionally appointed by the automobile manufacturers’ associations and other research organizations to lead an international team of experts which then successfully developed engineering solutions to the urgent problem of safety of occupants in passenger cars when involved in crashes with heavier SUVs or pickup trucks.

    His recent academic experience has been in the field of sustainable transportation and he has taught graduate courses in mechatronics systems in vehicles and intelligent tire-and-vehicle systems.

    Dr. Verma has published more than thirty papers in peer-reviewed journals and at international conferences and has been active in professional organizations as invited speaker, session chairman and organizer. He is well-known for his expertise in Vehicle Engineering and Traffic Safety and his interviews and opinions have appeared in US and in international media on several occasions

    Litigation Support – Dr. Verma’s recent litigation-related work has been in two fields:

    1. Automotive forensics – accident investigation and product liability evaluation of automobiles. His work includes detailed incident analysis, evaluation of the performance of vehicle and airbag systems, preparation of expert reports, depositions and trial testimony.

    2. Intellectual Property – analysis of a patent’s validity and evaluation of infringement claims for complex electromechanical and safety-related components. This includes literature search, prior art, detailed reports on validity & infringement and deposition and trial testimony.

    His clients have included automobile manufacturers, large corporations, private citizens and government entities.

    View Dr. Verma's Consulting Profile.
    Many automobile accidents are complex cases with multiple events during a single accident. The aim of forensic investigations of such (and all other) accidents is to reconstruct the sequence and the severity of events during the accident and then to establish cause and- effect relationships between the injuries (or damages) and the probable factors - vehicle design (e.g. brakes, structure, airbags); vehicle operator (e.g. distracted driver, alcohol impairment, reduced vision); and operating conditions (e.g. fog, failed traffic sign, excessive speed, icy road).

    Hybrid cars have been on US roads for many years, starting with Honda InSight (1999) and Toyota Prius(2000) in mass production.

    In crashes between two automobiles, it is generally assumed that the lighter vehicle will suffer more damage and that its occupants will suffer higher levels of injury.

    This article contains a few of the findings from our recent study of automobile safety in frontal crashes. Parts of the data analyses are presented but details such as the relationship of a particular design feature to the measured injury indicators are highly dependent on specific cases and are available only for individual discussions.

    The New Car Assessment Program (NCAP) conducted by the National Highway Traffic Safety Administration (part of the U.S Department of Transportation) underwent major changes recently. For automobiles designated as model years 2011 and later, the changes involve both what is measured and what is published.

    Over the years, there have been several product liability litigations regarding pedestrians being injured and the front structure designs of the vehicles being alleged as the significant factor.

    The structural behavior of automobile seats and seatbacks is one of the factors often examined in investigating injuries to a vehicle's occupant(s) in crashes.

    Airbags in modern automobiles have been around for many years and their record in improving occupant safety in crashes is generally well accepted. However, many questions still arise regarding their deployment and performance in crashes.

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