I read that her phone pinged 15 miles or kilometres away. Her friends doubted that she would go that far. They thought she would be home around 9 to get ready for brunch. At 1 PM her friends were worried and contacted her husband. He didn't notice that she did not return from her 7 AM run.
Smart watch is automatically synced with the computer and records heart rate, steps, etc. I don't think it helps with location, not sure. Even if it is not found or suddenly stopped working, heart rate irregularities or spikes would be recorded on her computer. A spiked heart rate would tell police something unexpected or sudden happened.
"'I believe she was going out for brunch that morning so I believe she would have been home by 9 or 10am,' she said."
DailyMail