Karmakazi, I was thinking maybe she had talked to someone and had planned on meeting him later. Maybe she talked to him while she was in the middle of jogging to her mom's house (and MAYBE this person had a burner phone that can't be tracked by LE). Maybe that's why witnesses saw her staring at her phone so intently. Maybe in the middle of her run to her mom's she made plans to meet this person later. So that's why she turned around and went back to her boyfriend's house. That could be the reason she didn't go to her mom's to eat brats either. This person may have had a personal matter and told MT that they didn't want anyone else to know (not sure what that would be though that they lied to her about). Maybe he told MT that he trusted ONLY her and only wanted to talk to HER about this matter. So because of that MT didn't tell anyone (and that's why no one talked to her or heard from her after she sent the last text OK about the brats). Also MT seemed so nice and she probably would have helped someone out especially if it was a friend, or a friend of a friend that she trusted. She COULD have come home. Maybe the friend told her that he would meet her as soon as he got off work. So she got home and did some homework really quick. Maybe she didn't have time to take a shower since she was going out later with this person so she left her jogging clothes on. I personally think at some point she slapped her red shirt on (maybe she didn't have any more clothes at the house to wear) so she wouldn't be going to meet this person with a skimpy jogging top on. So that would mean she was wearing the jogging top, jogging pants and her red shirt when this person picked her up. She put the dogs back up in the basement because she was leaving with this person.
Maybe she went to this person's house, a building like a church, another house (I mean there are many possibilities--this person could be a realtor or something and have taken MT to a house that she THOUGHT was his house, but it wasn't--maybe it was a house of someone out of town and he used that house and lied and told MT it was HIS house) and that was about the time MT sent the Snapchat around 9:45 when she WAS in someone else's house. Maybe this person didn't even know she took the Snapchat (could be why LE doesn't want to mention the Snapchat anymore, because it could uncover certain info. especially if they end up getting a search warrant and search people's houses and DT maybe can go with them and give them an idea of someone's house and if that is what he remembers in the Snapchat or not when MT sent it to him). Not sure why she would have had her headphones with her though in this scenario. Maybe she wanted her music with her and decided to take them with her so she could listen to music on the way to the place this person was taking her to or something. That would explain her headphones missing.
Maybe MT was wearing contacts while she was jogging, but took them off when she got home and slapped on her glasses to do homework. Maybe when she left with this person she didn't feel like she needed her glasses or her contacts, especially if she was not going to be driving herself or doing homework or anything that required her to look up close (I am assuming that she is nearsighted). If she is nearsighted (I wish I knew) she would not need her glasses or contacts all the time. It would be good to have them though while driving and in school because you are required to look at things that are up close. I am nearsighted and many times I don't wear my glasses. Back when I used to wear contacts I DID that, however put them in all the time when I went to school or college. However if I didn't need them I didn't wear them, because I tried to get as much use out of them that I could get (the more you use them the more likely you have to replace them and get another pair). The less I wore my contacts the more I saved money (maybe MT was thinking on the same lines).
Then MT was at this person's house or wherever he took her and not long after she sent that Snapchat he made an advance on her and things turned ugly and he hurt MT in an accident. But an accident wouldn't be as planned out. So my other theory (which I think is more likely) is that maybe this person had all this planned out (maybe they knew MT through a friend or they were friends with MT but not a close friend and she THOUGHT she trusted them, and over a certain amount of time they gained her trust to do this) way in advance. Maybe he was also stalking her or something on social media. Maybe he was keeping up with her friends and boyfriend and that's how he found out that she was going to be home alone (making it the perfect time for him to plan all this out and abduct MT and do whatever he wanted to do to her).
Another possibility (and I favor this scenario over the above scenario) is that for SOME reason she went back home. Maybe she remembered at the last minute that she had a homework assignment that she forgot about and she needed to do it and get it turned in. So she decided not to go to her mom's house for brats and headed back to her boyfriend's house to get that assignment done asap so she could turn it in before the deadline. Maybe her phone was going in and out on her way back and she couldn't text her mom back (or maybe she just figured she would text her mom later). Maybe she just figured she would get her brother to take her to work the next day so she would just let her mom and brother know in the morning (why worry about that now). Maybe she got home and did some homework really quick and decided not to change or take a shower right away. Maybe then she took her contacts off when she got home. Maybe she then put on her glasses to do homework. Then maybe after doing homework she sent the Snapchat to her boyfriend from his house.
Then maybe she decided she was going to get a shower and go to bed. Maybe she heard a knock at the door right when she had taken her glasses off (that would mean she would still be in her jogging clothes, red shirt, and no glasses or contacts). She may have also still had her headphones on (because she hadn't had a chance to take them off yet). Then once she opened the door maybe it was a friend that she knew (who she THOUGHT was a friend and who she THOUGHT she trusted). Maybe he lied to her (could have even been a guy or something that worked with her boyfriend and she knew him too as a friend) and said there is an emergency and her boyfriend is hurt and she might want to come with him. Maybe the dogs were barking up a storm and that is about the time she decided to put them up in the basement and she slapped her red shirt on to have a little more cover than just a jogging top. And maybe she still had not had time to take her headphones off. Maybe since the person told her it was an emergency about her boyfriend (or they could have even told her it was something like an emergency about her mom or even her dad) she got frazzled and was all upset and trying to hurry and get out of the house to go with them to find out what happened.
Then right as she walked out the door with him maybe he injected her with something or subdued her with chloroform or something like that. If he did it right at the doorway then there would have been NO evidence in the house. If there was a garage there at her boyfriend's house (not sure if he has a garage) he could have even parked his vehicle in the garage (and at the time she may have thought nothing of it (his vehicle would have been hidden very well that way). And he did what he did to her (like injecting a syringe with something in it that would subdue her) so quick that she didn't know what was happening, and it didn't even give her enough time to react (like trying to call her mom or anyone). And I heard somewhere she would have her Fitbit on because she wore it all the time. These are all far fetched, but POSSIBLE.
Or maybe she DID get abducted while jogging which I think is also possible. It would be easier that way and less evidence left than trying to snatch someone up from the house they are staying in.
JMO.