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Digital Evidence
Toyota Lexus TechStream / VCH Event Data
Lexus vehicle-control and TechStream data recording speed, shifting, steering and acceleration. A disputed infotainment timestamp was amended to 12:32:16.
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The prosecution's core vehicle evidence, with event 12629-B showing the vehicle reversing at 24.2 mph with approximately 74–75% throttle over 62–97 feet with minimal steering input, argued to be consistent with a pedestrian collision. The defense contested geographic placement of the events, the partial 10-second capture window, and whether the data proves a collision occurred at all rather than merely a backing maneuver.
Raw vehicle control history and TechStream EDR data from Karen Read's 2021 Lexus LX570, recording triggering events at odometer readings 12,629A and 12,629B. The data captures shift position, speed, steering angle, and acceleration in 10-second windows. A disputed timestamp on infotainment trigger 11622 was amended from 12:31:38–12:31:43 to 12:32:16, a 33-second shift central to the timeline dispute.