Stanley C. Stoll, M.Eng., P.E., DFE, CFEI, CVFI
Crane Accidents Expertise Area
CEO - Principal Engineer
Stanley Stoll, PE, is the CEO and Principal Engineer of Knott Laboratory, where he leverages his extensive background in structural engineering, airborne combat engineering operations, and advanced forensic technologies to lead a team of experts in solving complex engineering challenges. With extensive experience spanning nearly three decades, Mr. Stoll has investigated thousands of cases, including structural collapses resulting in injuries and fatalities, such as the fatal steel erection collapse in Severance, CO, fatal roof truss collapse in Phoenix, AZ, and an Airbnb deck collapse in Colorado Springs, CO where his analyses were crucial in identifying the root causes of the failures and resulting injuries.
Mr. Stoll's pioneering work in applying laser scanning technology to forensic building investigations has set new standards in the field. His team's analysis of the JFK assassination, using precise 3D modeling of Dealey Plaza, has garnered international attention and underscored the importance of modern forensic techniques in investigations, whether Presidential assassinations, high-profile shooting reconstructions, or infrastructure analysis. As a former combat engineer and graduate of the U.S. Army's sapper school, Mr. Stoll brings a wealth of practical knowledge in ballistics and explosives to his forensic practice. This unique combination of skills enables him to provide unparalleled insights into shooting and explosion investigations.
Under Mr. Stoll's leadership, Knott Laboratory has expanded its geographic presence and capabilities across multiple forensic disciplines, including accident reconstruction, digital media forensics, forensic building construction and safety assessments, and facility condition assessment, leveraging the company's 40+ year history in accident reconstruction. The company has now performed work in all 50 states and several international jurisdictions. He has enhanced these divisions by recruiting top-tier talent, providing advanced training, and integrating state-of-the-art technologies such as 3D laser scanning and promoting collaboration across the company. These technologies enable the creation of precise 3D models and simulations, providing clear and compelling evidence in legal proceedings. This expertise allows him to present at international conferences, where he shares insights on the latest advancements in forensic technology, particularly in the areas of shooting and accident reconstructions.
Committed to advancing the field, he serves as Chair of the National Council of Structural Engineering Associations’ Building Assessment Group, advocating for improved infrastructure maintenance and safety standards, informed by his extensive experience with forensic investigations and litigation support.
Education
M.Eng. Civil Engineering, (Structural)
University of Louisville, Louisville, KY, August 2009
B.S. Civil and Environmental Engineering
University of Louisville, Louisville, KY, May 2009
Noncommissioned Officer School
United States Army, USA, 2002
Registration
Registered Professional Engineer in the following states:
Arizona, California, Colorado, Kansas, Minnesota, Montana, Nevada, New Mexico, Texas, Utah.
Engineering and Design
Please see Mr. Stoll's resume for complete engineering, accident reconstruction, expert witness, and media experience.
Accident Reconstruction
Expert Testimony
Achievements
Professional Affiliations
Mr. Stoll is a member of the following professional organizations:
American Society of Civil Engineers
International Association of Arson Investigators
National Academy of Forensic Engineers
National Association of Fire Investigators
National Fire Protection Association
National Society of Professional Engineers
Structural Engineers Association of Colorado
Media Appearances
Knott Laboratory has been featured on numerous television programs nationally and internationally. Click each title below to learn more about each appearance.
Minimizing Liability Risk in Engineering Product Design
Princess Diana’s Death: Unanswered Questions
Richard M. Ziernicki, Ph.D., P.E., DFE
(303) 925-1900
rziernicki@knottlab.com
Download Résumé
Publications
Dr. Ziernicki has evaluated several thousand industrial and vehicular accidents. He has presented papers and lectured at a number of technical conferences in the United States, Europe and South America. He is the author of seventy eight publications, primarily in the fields of mechanical engineering, and vehicle accident reconstruction. His accident reconstruction expertise has been featured over thirty times on local and national television including the Discovery Channel, Dateline NBC, Dr. Oz Show, MSNBC, FOX News Channel and National Geographic Channel on accidents such as the Princess Diana accident, on the Air France Flight 447 accident and more. Ph.D. Technical Science, magna cum laude, specialty in dynamic analysis M.S. Mechanical Engineering, specialty in design of heavy industry and foundry machinery B.Sc. Mechanical Design Registered Professional Engineer in the following states: Certified by National Council of Examiners for Engineering and Surveying, Certification # 30881 Board Certified Diplomate in Forensic Engineering by the National Academy of Forensic Engineers Dr. Ziernicki taught mechanics, stress analysis, strength of materials, and vibrations at the Institute of Vibrations and Acoustics. While Manager of the Research and Development Group in Krakow, he developed techniques for dynamic modeling, analysis of vibrations, and optimization of mechanical systems. He was actively involved in the modeling of engine-gearbox systems and vehicle suspensions, and in pneumatic tire testing. As Manager of Mechanical Engineering with Over-Lowe, Dr. Ziernicki was in charge of mechanical design, dynamic analysis, and testing of product lines including engine generator sets, transport carriers, trailers, portable lighting equipment, pneumatic towers, and light construction equipment. He prepared technical proposals for the Department of Defense in the areas of torsional and transverse vibrations, rotor balancing, noise control, machine design, dynamic modeling, tolerance analysis, and testing. Currently with Knott Laboratory, Dr. Ziernicki is consulting in the areas of patent and trade secret issues related to mechanical engineering. Dr. Ziernicki has evaluated several thousand industrial and vehicular accidents. He conducts and directs investigations of vehicular accidents, which include automobiles, tractor-trailers, buses, motorcycles, bicycles, and pedestrians. He is very familiar with Federal Motor Carrier Safety Regulations (FMCSR). He also consults on industrial accidents and machinery failures and machine safety (including cranes, forklifts, skid steers, wood chippers, balers, other industrial and construction equipment). In safety analysis he applies industry safety standards and regulations including Occupational Safety and Health Administration (OSHA), American National Standards Institute (ANSI), International Organization for Standardization (ISO,) and Society of Automotive Engineers (SAE) and more. Dr. Ziernicki performed research and field investigations for the National Highway Traffic Safety Administration (NHTSA) as an investigator and team member for NHTSA’s Crash Injury Research and Engineering Network (CIREN), which is comprised of engineers and trauma doctors. He investigated the Princess Diana accident in Paris, France and collapse of “Big Blue” crane in Miller Park, Milwaukee. He also investigated high profile motor vehicle accident in Germany on behalf of United States Department of Defense. Dr. Ziernicki was a lead investigator and testifying expert on an explosion that destroyed a boiler of 450 MW coal-and-gas fired power plant a $600 million lawsuit. He investigated the Princess Diana accident in Paris, France and collapse of the “Big Blue” crane in Miller Park, Milwaukee, and recently the NASCAR case Kevin Ward, Jr. vs. Tony Stewart. A functional knowledge of manufacturing processes and design interface has allowed him to obtain design patents in the USA and Canada. Dr. Ziernicki has presented papers and lectured at a number of technical conferences in the United States, Canada, Europe, and South America. He has been invited to speak at seminars and conferences including Johns Hopkins University, the SAE International in Sao Paulo, Brazil, ICRASH 2000 in London, and the Five State Judicial Conference where he also served as a faculty member for the Harvard Law School. He has also lectured at the university level including the Technical Institute in Vienna, the University of Mining and Metallurgy in Krakow, Poland, Purdue University in Lafayette, Indiana, the University of Denver, and the University of Colorado at Denver. He is the author of seventy eight publications, primarily in the fields of mechanical engineering, and vehicle accident reconstruction. Dr. Ziernicki is a contributing author of five books on forensic engineering. Dr. Ziernicki’s accident reconstruction expertise has been featured over thirty times on local and national television, including Discovery Channel, Dateline NBC, Dr. Oz Show, MSNBC, FOX News, and National Geographic. He was awarded a grant for research in biomechanics by the National Science Foundation. Dr. Ziernicki was a member of several past SAE Standards Committees. Dr. Ziernicki is Past President and past board member for the National Academy of Forensic Engineers and also serves on Committees for the organization. Dr. Ziernicki received an award in 2012 in Appreciation of Distinguished Leadership as National Academy of Forensic Engineers President. In 2015, Dr. Ziernicki received the prestigious award for Manager of the Year from the National Society of Professional Engineers-Colorado (NSPE-CO). In 2016, Dr. Ziernicki received an award for his commitment with APITLA to promote the mission of “Putting the Brakes on Unsafe Trucking Companies.” Dr. Ziernicki was awarded the 2016 Private Sector Project of the Year for its “Advanced Forensic Engineering Analysis of a Shooting Incident” project, by the National Society of Professional Engineers-Colorado (NSPE-CO). As a result of his investigations, Dr. Ziernicki has testified in court as an expert witness in a few hundred cases and was deposed over 500 times. He works as an expert witness for clients such as US Department of Justice, US Department of Defense, State of Colorado Attorney General’s Office, District Attorneys, and Public Defenders. Dr. Ziernicki is a member of the following professional organizations: Dr. Ziernicki has been featured on numerous television programs nationally and internationally. Click each title below to learn more about each appearance.
Crane Accidents Expertise Area
Principal Engineer
Education
University of Mining and Metallurgy, Krakow, Poland, 1979
University of Mining and Metallurgy, Krakow, Poland, 1975
University of Mining and Metallurgy, Krakow, Poland, 1973Registration
California, Colorado, Florida, Texas.
Engineering and Design
Accident Reconstruction
Achievements
Expert Testimony
Professional Affiliations
Accreditation Commission for Traffic Accident Reconstruction
American Society of Mechanical Engineers
National Academy of Forensic Engineers
National Society of Professional Engineers
Professional Engineers of Colorado
Society for Experimental Mechanics
Society of Automotive Engineers
Media Appearances
Minimizing Liability Risk in Engineering Product Design
Princess Diana’s Death: Unanswered Questions
