Phone 'Darkness' Key to Nancy Guthrie Case

Digital forensic investigators are leveraging strategies proven effective in the Bryan Kohberger case to locate Nancy Guthrie, who was abducted from her Tucson, Arizona home on February 1. Agents are meticulously examining cell tower data to identify abnormal phone activity, such as devices being switched off during the early morning hours when the abduction occurred.

According to Heather Barnhart, an expert involved in the Kohberger investigation, a phone going dark is a significant clue. Investigators are analyzing cell tower 'pings' to track devices entering and leaving the area around Guthrie's residence, with particular interest in those not belonging to the local vicinity. This systematic approach aims to uncover any suspicious patterns of behavior, mirroring the digital footprint analysis that was crucial in the Kohberger case.

Reconnaissance activity, if any, is also being investigated by examining cell tower data for unusual pings prior to the abduction. This involves identifying any devices that repeatedly ping towers in the area, indicating potential scouting. While the process is detailed and requires patience, Barnhart emphasizes that digital forensics offers a robust chance of finding the abductor, alongside other investigative tools like license plate readers and surveillance footage.