JUST IN: Officials Using ‘Signal Sniffer’ in Effort to Detect Guthrie’s Pacemaker

Investigators searching for Nancy Guthrie, the 84‑year‑old mother of Today show anchor Savannah Guthrie, have deployed a rare technology known as a “signal sniffer.” The device is being used to detect emissions from Guthrie’s implanted pacemaker, as authorities intensify efforts nearly three weeks after her disappearance in Tucson, Arizona.