Can you please share a MSM link re the watch stopping at Mt Clear? IMO that is an assumption but happy to stand corrected? It would be good info to confirm as fact if we can.
Edit: I agree re 8am and Mt Clear, police made it clear something happens at that time IMO. Just not sure we can say the watch stopped?
It could have increased pace to vehicle speed, sudden change in direction, pulse increased, or stopped, or something else. It could also have been phone data not watch data that changed at that time (or both). All we know is something happened to focus police on this place & time, not the what, IMO.