AZ v. Mark Gooch Trial Day 5 - Direct Exam of Sev Dishman - Location Data Specialist

TL;DR

Expert analyzes cellular data to track phones through various locations and connections, revealing gaps and matching patterns.

Transcript

the record reflect the presence of counsel the defendant and the jury mr barker you may proceed thank you so before the break i was asking you about the accuracy of nilos and what could make it more accurate how many nilo's records have you reviewed yourself so the zx system itself has mapped over 90 million i personally in the last couple of years... Read More

Key Insights

• 😒 Nilos records offer a detailed analysis of cellular data, revealing individual GPS use and patterns of movement.
• 👋 Ranking of Nilos records indicates defendant's phone as the second best among cases studied, showcasing active GPS usage.
• ❓ Cellular data exhibits a unique grid-like pattern during movement, deviating from precise GPS navigation but closely aligning with general routes.
• 🙂 Outgoing connections highlight defendant's regular communication patterns, shedding light on familiar contacts and routine interactions.
• 📌 Location accuracy in Nilos records explains variations in cellular tracking, revealing the nuances of GPS signal piggybacking and location data representation across different cases.
• ✋ Gaps in data connections uncover stagnant activity, stops at specific locations, and disruptions in cellular coverage for detailed analysis.
• 📱 Expert testimony provides in-depth insights into mobile phone movements, network connectivity, and cellular data interpretation for investigative purposes.

Questions & Answers

Q: How many Nilos records have been reviewed by the expert, and what insights have they gained?

The expert has personally reviewed well over a hundred different Nilos reports, totaling tens to hundreds of thousands of individual hits. They have gained insights into GPS accuracy, chatty location data, and patterns of movement based on cellular records.

Q: Why is the ranking of defendant's phone second best among the Nilos records reviewed?

The defendant's phone ranks as the second best due to its active GPS use, leading to more accurate Nilos data. The expert compared it to over 100 cases and identified it as the second-best Nilos records they have seen.

Q: How does the cell phone's location accuracy in Nilos records compare to GPS navigation?

The Nilos records showcase a distinct grid-like pattern in location data, following vertical and horizontal lines akin to a grid system, as opposed to GPS navigation, which offers more precise tracking but aligns closely with general routes.

Q: What is the significance of the outgoing connections identified in the cellular data analysis?

The outgoing connections reflect the defendant's normal pattern of life, focusing on communication with familiar contacts. Analyzing these connections provides insights into the individual's circle of communication and typical interactions.

Summary & Key Takeaways

• Expert analyzes over 90 million Nilos records, revealing tens of thousands of hits per case.

• Detailed tracking shows defendant's phone ranking as the second most accurate among cases reviewed.

• Examination of cellular data provides insights into individual GPS use and patterns of movement.