The engine evaluates paired temporal envelopes between prosecution surveillance hypotheses (e.g., GPS pings, license plate reader scans, or alleged physical tailing) and verified defense exculpatory records (e.g., cell tower Wi-Fi association, interactive iMessage typing indicators, and VoIP spousal phone calls). Overlaps where physical travel velocity between points exceeds realistic speed (>65 mph) or where synchronous biometric/device interaction precludes concurrent presence are flagged as Contested Overlaps / Defense Alibis.

Under FRE 901, digital text extractions require proponent testimony proving the message was authored by the alleged sender, not merely originating from their handset. Under FRE 803(6), cellular tower call detail records (CDRs) qualify as self-authenticating business records when accompanied by a custodian certificate. Under FRE 403, defense counsel frequently challenges prejudicial surveillance data whose probative value is substantially outweighed by unfair prejudice or misleading the jury.