Where's her purse and what did it look like? As someone said before, maybe it was her purse inside the backpack? I never do that personally because if someone grabs the backpack they have everything. Plus, it's harder to access things when you're out and about. Just my 2 cents.
What is really weird to me is the time. MB was last seen in the middle of the afternoon, almost the middle of the week, on a Tuesday at 1:45 p.m (CT) (according to this article
‘I feel that I have failed you’: mother asks for help finding Mekayla Bali ) She had a violin rehearsal at 4 p.m that day.
It seems like an odd time of day to be meeting someone for certain purposes (whatever they may be). I could see how it might seem like a good time of day because she could sneak out in between obligations to do something (whatever she thought she was doing). But what? Did she have no intention of going to her rehearsal?
What do we all think? Was she intending to meet someone from online? A guy she'd been talking to? Someone else?
Here is a case that doesn't seem to be here on WS
Belgian 'Pokemon murderer' sentenced to life imprisonment
"He had lured Moreau to his apartment with a promise of trading Pokemon figures."