Samuel R. Henning, P.E.

Civil and Structural Engineering (Expert)

Director of Engineering


Mr. Henning received his Bachelors of Science Degree in Civil Engineering from the University of Colorado in Boulder, CO. Mr. Henning worked in the oil and gas sector as an Engineer for approximately 5-years after graduating. More recently, Mr. Henning transitioned back to the Civil/Structural world in 2017. His experience as a Project Engineer includes structural engineering design for the construction of single-family residences, multi-family residences, and steel structures. He also has extensive experience forensic engineering investigations for the insurance industry and assists in my construction defect related cases for various law firms.

Education


B.Sc. in Civil Engineering
University of Colorado, Boulder, CO, 2012

Registration


Registered Professional Engineer in the following states:
Colorado.



Forensic Engineering


Mr. Henning has three-years of experience conducting onsite investigations. These investigations typically require additional calculations and analysis summarized in comprehensive reports. Typical investigations consist of damage including differential foundation movement, collapses/failures, fires, floods, hail, and moisture intrusion. He also will design structural repair plans to correct these deficiencies, if requested.

Mr. Henning has also been involved in multiple lab-testing of truss capacities, parapet wall capacities, and other job-specific testing requirements. This work involved designing and building the testing apparatus as well as performing the actual tests to the materials. After the testing, he has analyzed the results and provided summary reports of the findings.

Additionally, Mr. Henning’s work in the oil and gas sector has given him a unique perspective concerning plumbing, piping, heating/cooling systems, thermodynamics, and hydromechanics. Mr. Henning has conducted multiple analysis concerning freeze-loss type cases in which the interior temperature of a particular structure is modeled to determine the internal temperature change over time – this helps determine the circumstances surrounding pipe-bursts, mechanical equipment failures, etc.

Engineering and Design


Mr. Henning has experience designing foundation, framing, and roof framing plans for residential and commercial structures. Additionally, he has analyzed many structures with differential movement and modeled the floor levels by using 3D contour survey. Based on these survey, Mr. Henning has sized remedial foundation installation such as micro piles and push piers. Additionally, Mr. Henning has designed micro pile foundations for new construction. More recently, he has been involved in designing light-gauge and red-iron steel buildings for residential applications.

Mr. Henning has also designed multiple remedial repair plans with structures exhibiting fire, flood, wind, and snow damage. These type of designs require additional analysis and consideration on the most practical and economical method to fix a damaged structure. Similarly, he has been involved on several projects including damage to exterior cladding materials such as hardcoat and EIFS stucco siding.

Expert Testimony


Achievements


Professional Affiliations

Mr. Henning is a member of the following professional organizations:


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Media Appearances

Knott Laboratory has been featured on numerous television programs nationally and internationally. Click each title below to learn more about each appearance.


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Cade R. Caldwell, P.E.

Civil and Structural Engineering (Expert)

Vice President of Engineering


Mr. Caldwell has investigated cases involving property damaged by fire, flood, moisture intrusion, inadequate drainage, pipe failure, corrosion, hail, wind, mold, soil subsidence, foundation failure, structural member failure, vehicular collisions, construction defects, and mechanical damage. At Knott Laboratory, Mr. Caldwell conducts structural evaluations and failure analysis on residential and commercial structures, building envelopes and civil systems and has experience in destructive testing, non-destructive testing and simulation of failure modes and scenarios. Mr. Caldwell has experience as an Expert Witness in a variety of legal matters including Construction Defects and repair cost estimations.

Education


Bachelor of Science Degree
University of Colorado at Denver, Denver, CO, 2004

Registration


Registered Professional Engineer in the following states:
Colorado, Kansas, Missouri, Nebraska, Ohio, Oklahoma, Montana, Wyoming.

Record Holder
National Council of Examiners for Engineering and Land Surveying


Engineering and Design


Mr. Caldwell has over 17 years of experience in many facets of civil and structural engineering. Eight years of land surveying experience as a crew chief supervising construction staking and topographical surveys for heavy highway construction, urban and rural roads, residential and commercial buildings, bicycle paths, bridges, hydraulic features and infrastructure, over-lot grading of large land development projects; and legal surveys including research, recovery and re-establishment of property boundaries in compliance with local jurisdictions and standard surveying practices. Seven years of experience as a structural design engineer determining loads and applicable building codes for residential and commercial buildings and the design of structural systems and elements to resist the loads. Design experience with all building materials including masonry, wood and timber, reinforced concrete, structural and light gage steel, and composite building materials. Foundation design including drilled concrete piers, grade beams, spread footings, mat foundations, and Post Tensioned slabs. Two years of experience as a consulting (forensic) engineer conducting engineering investigations and determining the cause of structural failures. Forensic experience includes roof covering evaluations, building collapses, foundation movement, determining structural integrity of damaged buildings, and sources of water intrusion.

Accident Reconstruction


Expert Testimony


Achievements


Professional Affiliations

Mr. Caldwell is a member of the following professional organizations:


Nothing found.

Media Appearances

Knott Laboratory has been featured on numerous television programs nationally and internationally. Click each title below to learn more about each appearance.


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Stanley C. Stoll, M.Eng., P.E., DFE, CFEI, CVFI

Civil and Structural Engineering (Expert)

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:


Nothing found.

Media Appearances

Knott Laboratory has been featured on numerous television programs nationally and internationally. Click each title below to learn more about each appearance.


Nothing found.


Scott B. Hargrove, M.S., P.E.

(303) 925-1900 Download Résumé

Civil and Structural Engineering (Expert)

Director of Engineering


Mr. Hargrove is an Engineering Manager at Knott Laboratory based in Fort Collins, Colorado. Mr. Hargrove is also currently the President of SEAC. He has his BS and MS from the University of Colorado and has 13 years of experience in the construction and structural engineering design industry as well as 5 years of experience in forensic engineering with Knott Laboratory. His experience includes complete structural engineering design for the construction of single-family residences, multi-family residences, commercial projects of various sizes, and various industrial projects. He also has extensive experience in reconstruction and historical building renovation and repurposing.

Education


B.Sc. Civil Engineering
University of Colorado - College of Engineering, Boulder, CO, 2005

M.S. Structural Engineering
University of Colorado - College of Engineering, Denver, CO, 2021

Registration


Registered Professional Engineer in the following states:
Colorado, Arizona, Montana, Texas, Wyoming.



Forensic Engineering


Mr. Hargrove has nearly two years of experience as an assistant project manager for commercial construction projects, three years of experience as an assistant/associate civil engineer, and seven years of residential/industrial /commercial structural engineering. Mr. Hargrove’s responsibilities have included complete structural engineering for both new construction and remodeled residences, water treatment plant platforms and foundations, design and support services for wind energy projects, a potable water pipeline project, fall protection systems, landfill cleanup and redesign, on-site supervision of final phase of tilt-up commercial construction and finish work, detailed plan review and modification, and various other engineering projects.

Mr. Hargrove’s experience with engineering design and project management has given him a unique understanding of construction processes, enabling him to readily identify sources of civil and structural failures. Mr. Hargrove has designed residential structures for new construction, additions and structural repair. At Knott Laboratory, Mr. Hargrove conducts structural evaluations and failure analysis on a wide range of residential and commercial structures, building envelopes, and civil systems. Mr. Hargrove’s practical experience enables him to accurately identify a wide variety of structural problems and failures as well as design repairs or improvements as necessary.

Engineering and Design


Mr. Hargrove has overseen the construction and design of small wood-framed projects to large steel and wood framed wedding venues.
Example Projects:
- A multitude of repairs to residential and commercial structures as a result of environmental and man-made damages
- A multitude of new build single family residences in the Crested Butte and Fort Collins areas
- A multitude of remodel and addition projects in the Crested Butte and Fort Collins areas
- Black Canyon Event Center in Estes Park, Colorado
- Alarado Business Park in Estes Park, Colorado

Professional Affiliations

Scott B. Hargrove, M.S., P.E. is a member of the following professional organizations:


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Media Appearances

Knott Laboratory has been featured on numerous television programs nationally and internationally. Click each title below to learn more about each appearance.


Nothing found.