David Hallman is a Forensic Mechanical and Metallurgical Engineer (forensic engineering consultant) with over twenty five years combined experience in materials analysis and research, mechanical engineering, automotive mechanics and forensic failure analysis. He has significant, hands-on automotive repair experience coupled with degrees in mechanical engineering from the University of Saint Thomas (BS) and materials science and engineering from the University of Minnesota (MS). David spent ten years working as a professional automotive mechanic prior to earning his two degrees. He is a Licensed Professional Engineer in Minnesota, Wisconsin, Iowa, North Dakota, South Dakota, Illinois, Kansas, Oklahoma and Nevada, a National Association of Fire Investigators Certified Vehicle Fire Investigator and an ASE Certified Master Automobile Technician.
David's significant automotive background coupled with his two degrees makes him ideally suited for all aspects of crash investigation. He performs crash reconstruction and also has been called upon to investigate potential mechanical causes for vehicle crashes. David has an excellent understanding of vehicle mechanical systems including automotive, light truck, medium truck and heavy truck systems. He has also been trained in vehicle crash data (CDR) collection and interpretation. Some of the cases David has investigated include a vehicle tie rod failure that triggered a cross over crash, several unintended vehicle acceleration cases and cases involving alleged heavy truck brake failure. David has also been involved in multiple cases involving tire failure analysis. Since 2011, David has been involved with several different crash teams around the country and has been deeply involved in planning and executing crash tests.
A skilled forensic engineering consultant, David works with Lawyers, Paralegals, Insurance Investigators, Claims Adjusters and other Subject Matter Experts on a wide variety of forensic mechanical, forensic materials and forensic metallurgical investigations. These investigations have included but are not limited to an elevator failure involving materials and design issues, a personal injury involving a paper shredder, multiple cases involving farm equipment and personal injuries, machine guarding cases, chair collapse cases, bolted joint failures, patient lifter failures, vehicle hand control issues, trip and fall cases, tipped telehandler and boom crane cases.
David has testified in court and in deposition on multiple occasions. All forensic engineering investigations are performed using the Scientific Method as the basis for the inquiry. The opinions presented in each matter are based on the facts of the case.
- Accident Reconstruction
- Automotive Engineering
- Failure Analysis
- Forensic Engineering
- Materials Engineering
- Mechanical Engineering
- Professional Engineering
- Seat Belts & Air Bags
- Slip, Trip & Fall
- Q: Please list your professional accreditations, degrees, licenses, and certificates granted:
- A: BSME, University of Saint Thomas, MN
MS Materials Science and Engineering, U of M, MN
Licensed Professional Engineer – Minnesota License 48027.
Licensed Professional Engineer – Illinois License 062.068403.
Licensed Professional Engineer – Iowa License 23448.
Licensed Professional Engineer – North Dakota License PE-10574.
Licensed Professional Engineer – South Dakota License 12959.
Licensed Professional Engineer – Wisconsin License 44866-6.
Licensed Professional Engineer – Kansas License 26254.
Licensed Professional Engineer – Oklahoma License 30494.
Licensed Professional Engineer – Nevada License 026582.
Automotive Service Excellence, Certified Master Auto Technician, 2000-2005, 2010-2020.
Crash Data Retrieval (CDR) Technician Level 2 Certification
Crash Data Retrieval (CDR) System Operator Certification – Analyst Course, 40 hours
Crash Data Retrieval (CDR) Certified Trainer Mentor Certification
National Association of Fire Investigators Certified Fire and Explosion Investigator
National Association of Fire Investigators Certified Vehicle Fire Investigator
- Q: Please list your affiliations or memberships in any professional and/or industry organizations:
- A: National Association of Fire Investigators (NAFI) – CFEI, CVFI
Society of Automotive Engineers International (SAE)
• Article Peer Reviewer
Accident Reconstruction Network
• Member of ARC-CSI crash crew 2011 - 2017
Minnesota Society of Professional Engineers (MSPE)
Midwest Association of Technical Accident Investigators (MATAI)
• MATAI crash crew lead 2018 - 2019
Southwestern Association of Technical Accident Investigators, Inc. (SATAI)
• Member of SATAI crash crew 2013 - 2020
National Association of Professional Accident Reconstructionists (NAPARS)
• E58 Committee Member
International Association of Arson Investigators (IAAI) – MN Chapter
American Academy of Forensic Sciences (AAFS)
• Associate Member
American Society for Engineering Education
• Article Peer Review
- Q: Please list any teaching or speaking experience you have had, including subject matter:
- A: Adjunct Faculty - Minnesota State University, Mankato
“ARC-CSI Crash Team Boot Camp” Data Collection and Team Presentation, ARC-CSI Crash Conference, Las Vegas NV, May 22-26, 2011
“What’s New in Vehicles and Crash Investigation”, Crane Engineering Seminar, Minneapolis, MN, October 19, 2011.
“Vehicles and Crash Investigation”, MDLA Lunch and Learn Presentation, Minneapolis, MN, October 5, 2011.
“Properties of Metals including fatigue, corrosion, failure analysis, crystal structure, phase diagrams, processing and electrical, thermal and magnetic properties”, two 3-hour lectures, University of Saint Thomas, ETLS 771 Materials Engineering Class, October 2012.
“Differentiating Potentially Causal Pre-Crash Component Damage from Crash Damage”, 2013 ARC-CSI Crash Conference, Las Vegas, NV, May 15, 2013.
“Vehicle Mechanical Forensics and Tire Failure Analysis”, 2013 SATAI Fall Conference, Phoenix, AZ, September 28, 2013.
“Properties of Metals including fatigue, corrosion, failure analysis, processing and electrical, thermal and magnetic properties”, one 3-hour lecture, University of Saint Thomas, ETLS 771 Materials Engineering Class, October 31, 2013.
“Unique Features of Toyota Gen3 Data”, 2014 CDR Summit, Houston, TX, January 28, 2014
“Wheel Slip and Its Effect on Reported Vehicle Speed”, 2014 ARC-CSI Crash Conference, Las Vegas, NV, June 4, 2014.
“Properties of Metals including fatigue, corrosion, failure analysis, and mechanical properties”, one 3-hour lecture, University of Saint Thomas, ETLS 771 Materials Engineering Class, October 23, 2014.
“Crashes and Vehicle Mechanical Failure, Are You Missing Subrogation Opportunities?”, 2014 NASP Fall Conference, Orlando, FL, November 11, 2014.
“Crash Data and Vehicle Mechanical Failures: What are you missing?”, 2015 MAJ Wrongful Death Seminar, Minneapolis, MN, February 5, 2015.
“Physics of Crashes”, Spring 2015 at Osseo Junior High School for 9th Grade physics students, one day, five sections of students, April 2015.
“Vehicle Battery Cable Arcing V. Melting Analysis”, 2016 ISFI Conference, Scottsdale, AZ, September 12-14, 2016.
“Mechanical Forensic Engineering”, Half Moon Education Incorporated Seminar, Minneapolis, MN, September 22, 2016
“Force and Motion”, Spring 2017 at Osseo Middle School for 6th Grade science students, one day, three sections of students, February 14, 2017.
“Toyota GEN3 Pre-crash Brake Data – Details and Application. (Co-presented with William “Rusty” Haight)”, 2017 EDR Summit, Houston, TX, March 7, 2017
“Wheel Slip and Its Effect on Reported Vehicle Speed”, “Vehicle Mechanical Inspections”, 2017 MATAI Annual Conference, June 7, 2017.
“Steering Failure in a Triple Fatality Crash”, 2018 AAFS Annual Scientific Meeting, February 19 – 24, 2018.
“2019 MATAI Crash Data Review”. Presented crash data from MATAI school bus crashes performed at 2019 MATAI Annual Training, Cedar Rapids IA. June 5, 2019.
“Mechanical Forensic Engineering”, 2019 Materials Camp, University of Minnesota, Amundson Hall, July 9, 2019
“2019 IPTA Crash Data Review” with Billy Cox, 2019 IPTA Annual Conference, Des Moines IA. July 17, 2019.
“Introduction to Vehicle Fire Investigation”, Provided Three Hour Training Course to Local Public Sector Fire Investigators from Hennepin County and Monticello, Minnesota, Maple Grove Fire Station #2, Maple Grove, MN. July 24, 2019. Vehicle burn testing (detailed under research) and further instruction (three hours additional training) was conducted on September 7, 2019 in Monticello Minnesota.
“I Have a Product Failure, Do I Need an Engineer?”, Invited presentation for the North Dakota Defense Lawyers Association Annual Meeting / Fall Seminar, Bismarck ND, September 19, 2019.
“Crash Reconstruction and EDR” Invited Presentation for the 2019 Fall AVCAW/WIASIU Seminar, Milwaukee WI, October 15, 2019.
- Q: Have any of your accreditations ever been investigated, suspended or removed? (if yes, explain)
- A: No
- Q: On how many occasions have you been retained as an expert?
- A: Over one thousand.
- Q: For what area(s) of expertise have you been retained as an expert?
- A: Root cause analysis of mechanical incidents and failures
Water loss investigations of all types
Farm equipment incident investigations
Construction equipment incident investigations
Other mechanical / materials incident investigations
Forensic Mechanical Engineering Consulting
Forensic Materials Engineering Consulting
Forensic Metallurgical Consulting
General Forensic Engineering Consulting
Crash Investigation / Reconstruction
CDR (crash data retrieval, "black box", EDR) collection and analysis
Vehicle mechanical investigations
Vehicle electrical investigations
Vehicle fire origin and cause investigations
Mechanical fire origin and cause investigations (structures)
- Q: In what percentage of your cases were you retained by the plaintiff?
- A: 51%
- Q: In what percentage of your cases were you retained by the defendant?
- A: 49%
- Q: On how many occasions have you had your deposition taken?
- A: 18
- Q: When was the last time you had your deposition taken?
- A: February 2020
- Q: On how many occasions have you been qualified by a court to give expert testimony?
- A: 14
- Q: On how many occasions have you testified as an expert in court or before an arbitrator?
- A: 14
- Q: For how many years have you worked with the legal industry as an expert?
- A: 10
- Q: What services do you offer? (E.g.: consulting, testing, reports, site inspections etc.)
- A: Consulting, site inspection, EDR data imaging and interpretation, reporting, expert witness
- Q: What is your hourly rate to consult with an attorney?
- A: $270.00
- Q: What is your hourly rate to review documents?
- A: $270.00
- Q: What is your hourly rate to provide deposition testimony?
- A: $270.00
- Q: What is your hourly rate to provide testimony at trial?
- A: $270.00
- Q: Please list any fees other than those stated above (E.g.: travel expenses, copy fees, etc.)
- A: Travel expenses as pass through.
Available Upon Request