David H Williams Expert Witness
Curriculum Vitae


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Specialties & Experience of this Expert Witness

General Specialties:

Telecommunications and Geotechnical Engineering

Keywords/Search Terms:

GPS, Cellular Forensics, Criminal Forensics, Mobile Location, Location-Based Services, LBS, Patents, Intellectual Property, Accident Reconstruction, Internet of Things, Data Privacy, Facial Recognition, Phone location; Cell phones, Telematics, Socia Media, IoT, Driverless


MBA, The University of Texas at Austin; BSEE, Purdue University

Years in Practice:


Number of Times Deposed/Testified in Last 4 Yrs:


Additional Information

David H. Williams is an internationally-known expert in the wireless/mobile location field and President of E911-LBS Consulting. He specializes in mobile/wireless location forensics litigation services and Intellectual Property/patents involving location technologies such as Global Positioning Satellite (GPS) systems, Network-based location systems, IoT, Wireless 911 (E911), and Real-Time Location Systems (RTLS), plus many others. Mr. Williams has successfully provided expert witness services in well over 150 patent, criminal, civil, anti-trust, trade secrets, product liability, fraud, class-action, and ITC cases. His credentials in mobile location goes back to the early 1980s. He has testified successfully in (U.S.) federal district court and other venues 10 times and been deposed over 30 times. Mr. Williams is expert in the full range of location-based services (LBS) applications enabled by these location technologies, including safety, security, and intruder detection/monitoring, vehicle/fleet tracking, telematics, local search, navigation systems, worker management, asset and freight management, wearable tags/sensors, financial/mobile wallet, family tracking, and social and business networking apps. Mr. Williams has very extensive patent and ITC court litigation experience, testifying in ITC Court and in Federal Court in the Eastern and Western District of Texas on (non) infringement and (in) validity of patents. His patent expertise focuses on a range of wireless technology and application applications, particularly with respect to mobile location technologies (e.g. GPS), applications, and associated infrastructure. He also serves/has served as an expert in criminal forensics cases in Federal, State, and other venues involving homicide/attempted homicide, arson, burglary, parole violation, and others. Mr. Williams can provide mobile forensics investigation and accident/crime reconstruction regardless of the platform from which the location records are obtained. This capability is rapidly becoming critical as location applications proliferate, and include the extraction and analysis of data from numerous platforms, including: Apple and Google (iOS and Android), and associated tech/apps (e.g. Airtags, iBeacons, Google Timeline) AVL (Automatic Vehicle Location) Systems Aviation (GPS systems), Underground asset detection Connected/Driverless Cars E911 Facebook/Instagram/Messenger Google Maps/Earth/Timeline (Specialty) GPS (e.g Parolee Ankle Bracelets, Asset Trackers) Home/Industrial Automation systems Internet of Things (IoT) Web browsers Location Aggregators Real Estate Applications SMART systems (Cities, Buildings, etc.) Social Media Surveillance/Safety Systems Telematics Vehicle Tracking