The "signal sniffer" being used in the Nancy Guthrie investigation was mounted on a helicopter on Monday.

MURFREESBORO, Tenn. (WKRN) — After approving construction on it back in March, new traffic signals are finally being rolled out in Rutherford County. Murfreesboro is one of the first cities to install ...

Authorities are attempting to use the device to detect the signal on Nancy's pacemaker over two weeks after she was reported ...