What is ‘signal sniffer’ that cops are using to find Nancy Guthrie pacemaker?

In a recent investigation involving the case of Nancy Guthrie, law enforcement officials are utilizing a sophisticated tool known as a 'signal sniffer.' Unlike traditional GPS devices, a signal sniffer is a radio-frequency detection mechanism that can identify wireless signals emitted by electronic devices. Though pacemakers are not inherently designed to broadcast a person's location, authorities are examining the potential of detecting any signals from Guthrie's implanted device as a means to gather leads in the case. The use of such technology highlights the evolving methods employed by police in their investigative work, showcasing a blend of medical technology and law enforcement strategies. This incident raises questions about privacy and the extent to which personal medical devices can be monitored in criminal investigations. As the case unfolds, it reflects the intersection of healthcare technology and public safety, emphasizing the need for clear guidelines on the use of such tools in legal contexts.