Regarding the pacemaker's role in the investigation, the department said, "Investigators are attempting to locate the device and are working with the manufacturer and other experts in the field to assist in that effort."
The department's comments come after law enforcement sources told
CBS News they are using a
"signal sniffer" to assist in the search for Nancy in an attempt to detect signals from her pacemaker
David Kennedy, a former NSA hacker who created and provided the device to authorities, referenced helicopters flying "really low to the ground" near Nancy's home, and noted that the distance to be able to ping a signal from Nancy's pacemaker is "very low,"
CNN reported on Monday, Feb. 16.
The Pima County Sheriff's Department previously highlighted the significance of Nancy’s pacemaker in the investigation, revealing additional details about its role in an
approximate timeline of her last known moments.
At 9:48 p.m., on Jan. 31, Nancy’s family dropped her off at home and the garage door was opened. Two minutes later, at 9:50 p.m., the garage door closed. This was the last time she was reportedly seen.
Several hours later, at 1:47 a.m., her
doorbell camera was disconnected. At 2:12 a.m., the camera briefly detected a person. Then, at 2:28 a.m., Nancy’s pacemaker was disconnected from the monitoring app on her cellphone.