Most interpretations are that probably happened because she moved out of the phone's bluetooth receiver range, as she was taken away and the phone left behind.It's interesting how the Sheriff described Nancy's pacemaker app disconnects from her phone at 2:28 a.m. He said "app" disconnects correct?
To disconnect a pacemaker app (such as Medtronic MyCareLink Heart, Abbott, or similar) from your phone, you should follow the specific unpairing procedures within the app to ensure data syncing stops properly. Because these apps are used for monitoring medical data, they often require deliberate steps to disconnect.
If someone deliberately disconnected her pacemaker app from her phone then someone had to have been accessing her phone to do that. No?
eg:
"Epps emphasized that this disconnection is most likely not an indication that Guthrie’s heart stopped, but rather that she moved out of Bluetooth range from her phone, which was found at her residence."
Digital evidence playing key role in search for Nancy Guthrie
Investigators are now asking residents in the Catalina Foothills area to submit camera footage from Jan. 1 through Feb. 2.
JMO