I am the father of a Mollie, whose lifestyle is remarkably similar.
I doubt Mollie went missing on her jog. The importance of the jog MIGHT BE that she caught someone's attention.
Then again, SOMEONE may have known that she was alone in that house.
All evidence revealed to date suggests she made it home comfortably and went about her normal business. IF it is true that the dogs would have slept with her, then it seems the time period moves to early morning, when her brother texted her. I have always felt that if Mollie did not go home for supper, then it was more likely she might return to her mother's home before going to work, especially given the story about ingredients the mother bought for Mollie to make a dessert for a co-worker's birthday.
It would be perfectly normal for Mollie to go to bed in her jogging clothes, and then let the dogs out upon waking. It would also make sense that anybody watching the house would expect this behavior.
Something happened after she put the dogs up before starting her day.
The start was interrupted, which explains why she had only her fitbit and jogging clothes. Anybody perpetrating this crime would have take her phone if for no other reason than to destroy it.
LE has known for weeks how far the digital signatures went, thus the searches. A young girl is taken from a home and her electronics venture a short distance from that home.
There is always the possibility of a clever psychopath stalking random victims. Then again, it would be wrong to rule out potential psychopaths who knew just enough about Mollie to know she was alone.
If the trail does not lead back to a local, there is a good chance it leads back to the University of Iowa, where Mollie came in contact with thousands of people and their social media connections who might take a morbid interest in a small town girl.
If it involved the latter, then the crime may have been committed and the perpetrator gone before Mollie was reported missing.
I hope I'm wrong.