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Digital Evidence
Prosecution Antenna Arc Ranging Maps (Exhibit 576)
Maps showing antenna ranging arcs for Karen Read's phone at two time points — 12:17 a.m. and 5:18 a.m. — admitted as Exhibit 576 in Trial 1 during Lt. Tully's testimony.
About
The prosecution used these maps to narrow the geographic range of Read's phone location at key times, with the arcs corroborating surveillance video timestamps. The maps were part of the CSLI and RTT analysis presented through Lt. Tully.