Investigators and Investigations Expert Witnesses and Consultants
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Experts in background investigations, database/DMV searches, surveillance, witness location, Increasingly, modern PIs prefer to be known as "professional investigators" rather than "private investigators" or "private detectives". security, domestic, employee violence and fraud examinations. Investigation experts do not necessarily perform "on-the-ground" investigative services in every state listed.
The listings below are all Investigators and Investigations expert witnesses and consultants.

Expert Listings

Mr. Yaniv SchiffQDiscovery Company
Mr. Yaniv Schiff
Chicago, IL
Expertpages Verified

Chicago-based firm providing top-notch assistance to law firms and corporations nationwide in expert computer forensics and electronic discovery services.

Gregory Witte - ACTAR 2340Forensic Crash Specialists
Gregory Witte - ACTAR 2340
Monroe, NY
Expertpages Verified

29 years of Accident Investigation experience including 20 years of at scene investigations as a police accident investigator. Specializing in Commercial Motor Vehicle Crashes Crash Data Download 3D Diagramming Animations Photogrammetry Motorcycle Crashes Pedestrian Crash. Deploying the latest in technology including aerial photography.

Robert JohnsonLaw Enforcement Policy And Practices Consultant
Robert Johnson
PALOS HEIGHTS, IL
Robert Johnson is a retired Lieutenant Colonel - Illinois State Police. Johnson continues to serve as a private consultant and expert witness regarding law enforcement policies and practices. He has been retained in over 100 cases and has been qualified in state & federal courts. He also conducts sensitive internal investigations. Johnson currently serves as an Assessor for the C.A.L.E.A. and has reviewed the operations of approximately thirty law enforcement agencies nationwide seeking accreditation.

Paul W. Logan, AIA, CFC, CHS-III, PCI, PSP, MSAJSThe Physical Security Architects, Inc.
Paul W. Logan, AIA, CFC, CHS-III, PCI, PSP, MSAJS
Denver, CO
The Physical Security Architects, Inc. (PSA) is a professional security and investigation security firm focused on making the built-environment more secure and safer for its users. With specialized knowledge and experience in architecture and construction, we have a unique understanding and appreciation for how the built-environment contributes to the occurrences of criminal behavior and critical incidents.

Gregory GilbertsonGilbertson Investigations
Gregory Gilbertson
Olympia, WA
Expertpages Verified

Professor Gregory Gilbertson provides attorneys with expert witness analysis and opinions on topics including excessive force, false arrest, police misconduct, self-defense, and police practices and procedures. He has been found competent to testify in US District Court. He has consulted with lawyers and law firms on nearly 60 cases in 14 states. A complete listing of his casework can be found at gilbertson-investigations.com.

Eugene O'NeillSkidmark Accident Reconstruction Specialists, LLC
Eugene O'Neill
Fernandina Beach, FL
Mr O'Neill has investigated hundreds of motor vehicle crashes and has been recognized as an expert in numerous courts.


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