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Digital Evidence
O'Keefe iPhone Waze GPS and Clock Comparison Data
Waze GPS, speed and heading data used to compare phone and Lexus clocks, yielding an estimated 21–29-second variance, plus a phone monotonic/display-clock discrepancy.
About
The Waze data served as an independent record of the three-point-turn event that anchored the clock synchronization analysis between the Lexus EDR and O'Keefe's phone. The prosecution relied on this synchronization to establish precise timing of events. Defense experts challenged the clock variance analysis by pointing to the approximately 3-minute difference between the monotonic and display clocks as relevant to timestamp interpretation.
GPS coordinates, speed, and heading records from the Waze navigation application on John O'Keefe's iPhone, extracted via Magnet AXIOM. The data includes records of a three-point-turn maneuver used to synchronize the iPhone clock with the Lexus infotainment system, yielding an estimated 21–29 second variance. A Magnet AXIOM screenshot also showed discrepancy between the phone's monotonic clock and its display clock.