I may be being a stickler for details, but I want to point out that it was said that she was doing homework in the late "evening", not late "night", there's a big difference. Evening typically starts about 5-6 p.m. and late evening is usually about 8-9 p.m. After that, it would usually be considered night, at least among most of the people I know. To me it sounds more like she ran from 7-8 as they said before, did some homework, sent the SC to DJ at some point, took a shower (either before or after homework, but definitely after the run), put the dogs downstairs and planned to go to bed because she had to be up early. It's possible someone came to the door after she had taken out her contacts and had put the dogs down for the night, but it could be before the shower, after the shower but before bed, after she was in bed for the night, or in the morning before she let the dogs up or put in her contacts (or put on her glasses.) I know, that really narrows things down!
The thing that bothers me is the phone. I keep wondering how long it kept pinging. It almost had to be either turned off or broken if it was already going directly to voicemail by 7:30 a.m. since I can't believe someone as responsible as she seems to be would forget to charge it. That makes me think whatever happened was either while she was getting ready for a shower or after she was up in the morning because I doubt that she wore her Fitbit and phone to bed at night. Sorry, I'm just rambling now. MOO