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Next-Gen Geolocation: Interpreting Cell Phone Location Data

This highly technical yet exceptionally practical program gives criminal defense lawyers a real-world understanding of how cell phone location evidence actually works—and, more importantly, how it can be misunderstood, overstated, and challenged in court. Drawing on decades of experience in law enforcement, narcotics investigations, telecommunications fraud investigations, and cell phone forensic analysis, the presentation walks attorneys through the evolution of cellular tracking technology from early 2G systems to modern 5G networks. The program explains the fundamental distinction between technologies designed for communication versus technologies designed for precise tracking, emphasizing a critical point that jurors and even investigators often misunderstand: cell phone location data is usually an estimate of a general area, not a precise “dot on a map” pinpoint location.

 

The presentation provides detailed, courtroom-focused explanations of call detail records (CDRs), tower dumps, timing advance data, sector analysis, GPS information, Wi-Fi location data, propagation mapping, and proprietary carrier algorithms used by companies like AT&T, Verizon, and T-Mobile. Lawyers will learn how timing advance technology estimates distance from towers, why data sessions differ from voice communications, how 5G frequency behavior affects reliability, and why confidence levels attached to “point locations” can be misleading when presented to juries. The program also explores the limitations of cell phone extraction tools, the dangers of historical and delayed location data, hidden reliability issues with GPS and Wi-Fi positioning, and how carrier-generated location estimates often rely on proprietary methodologies that remain shielded from independent scientific review.

 

Most importantly, this training equips criminal defense lawyers with practical cross-examination strategies and analytical frameworks they can immediately apply in real cases involving geolocation evidence. Attorneys will learn how to question the source of location data, challenge unsupported assumptions about precision and accuracy, expose gaps in carrier methodologies, and identify when prosecutors are overstating the reliability of mapping evidence. The presentation also addresses common investigative shortcuts, including misleading interpretations of tower usage, timing advance bands, and “frequently used tower” analysis. Whether handling homicide cases, narcotics investigations, digital surveillance evidence, or location-based prosecutions, this program provides criminal defense lawyers with essential tools to effectively challenge one of the most persuasive—and frequently misunderstood—forms of modern forensic evidence.

Tom Beiser

Tom Beiser is a recognized expert in cellular forensics, historical call detail record (CDR) analysis, and mobile network investigations, with nearly three decades of combined military, law enforcement, and private-sector experience. He began his career in the United States Navy as a radar operator aboard the P-3 Orion, developing a technical foundation in signal detection, timing, and propagation that directly informs his analysis of cellular location data. Tom later served fifteen years with the Easton Police Department as a patrol officer and vice-narcotics detective, executing and assisting in hundreds of search warrants and working alongside the FBI, DEA, and regional drug task forces. After eight years as the Director of LATRO Service’s Cellular Forensics Lab, in 2024, he founded LATRO Digital Forensics LLC, a veteran-owned firm specializing in forensic cell phone examinations, cellular geolocation analysis, and telecommunication fraud investigations. Tom is a licensed private investigator in New Jersey and Pennsylvania and has been qualified as an expert witness in courts across multiple jurisdictions.

CLE State Accreditation
  • General 0.50
  • General CLE-AL: 0.50
  • General CLE-WY: 0.50
  • General CLE-HI: 0.50
  • General CLE-SD: 0.50
  • General CLE-PA: 0.50
  • General CLE-IL: 0.50
  • General CLE-MT: 0.50
  • General CLE-NV: 0.50
  • General CLE-AK: 0.50
  • General CLE-MD: 0.50
  • General CLE-NM: 0.50
  • General CLE-VT: 0.50
  • General CLE-MA: 0.50
  • General CLE-DC: 0.50
  • General CLE-OR: 0.50
  • General CLE-WA: 0.50
  • General CLE-CT: 0.50
  • General CLE-NH: 0.50
  • General CLE-VI: 0.50
  • General CLE-AZ: 0.50
  • Technology CLE-NY: 0.60
  • Technology CLE-CA: 0.50
  • Technology CLE-NC: 0.50
  • Technology CLE-FL: 0.60
CLE State Accreditation:
  • General 0.50
  • General CLE-AL: 0.50
  • General CLE-WY: 0.50
  • General CLE-HI: 0.50
  • General CLE-SD: 0.50
  • General CLE-PA: 0.50
  • General CLE-IL: 0.50
  • General CLE-MT: 0.50
  • General CLE-NV: 0.50
  • General CLE-AK: 0.50
  • General CLE-MD: 0.50
  • General CLE-NM: 0.50
  • General CLE-VT: 0.50
  • General CLE-MA: 0.50
  • General CLE-DC: 0.50
  • General CLE-OR: 0.50
  • General CLE-WA: 0.50
  • General CLE-CT: 0.50
  • General CLE-NH: 0.50
  • General CLE-VI: 0.50
  • General CLE-AZ: 0.50
  • Technology CLE-NY: 0.60
  • Technology CLE-CA: 0.50
  • Technology CLE-NC: 0.50
  • Technology CLE-FL: 0.60