I think so too.
I am thinking now we know that she and he had been talking as more than a tour guide and tourist and that is 100% okay. Nothing wrong with meeting someone and talking to them, visiting, etc. If we think of it like that and she arrives and is excited to explore the US.. she trusts him, has been talking to him for months, and they are heading out for adventures. then why not leave those items locked up in the house vs bringing it all along on every adventure? All I am saying is I can see that happening and it being innocent, nothing nefarious so far.
I am not saying nothing criminal happened, I don't know, but her leaving those things in his house isn't indicative to me that he did something bad to her. Sounds like they headed out for tourist stuff. If she was visiting for 3 months, then that could be quite a bit of luggage.. no need to bring ALL her stuff everywhere.