Trying to think this through:
1:
MM arrives with Shaniya and leaves w/o her. If LE knew this, I believe they would tell us and they would have a description of whoever she left with, unless someone with dreds resembling MM took her out as well.
2:
MM arrives with Shaniya and leaves w/ her. If he changed her clothes, we would know -- if LE knew -- so that people could be on the lookout for her with those particular clothes on. We'd probably see a screenshot of that as well.
So here's the question: WHY take her to a hotel and leave with her having the same clothes on? If this were a big-time commercial ring, they would've had someone waiting with a change of clothes, hair color, whatever. Or, at a minimum would've instructed MM to have a different outfit for her.
Thinking of this leads me a scenario (similar to Panthera's, I believe) where MM took/bought/traded her from mom with the intent of selling her to someone else. Got to the hotel to hide out while finding a buyer. However, got a call that LE was on the lookout, so he leaves with her, kills her, and dumps her.
Either that or the buyer wasn't interested b/c of incontinence or damage, etc. So they just told him to get her out of there.
Either way, he could not go back - not now, especially if he had raped her: she'd tell. So he gets rid of her.
This case is really getting to me like no other.