I cannot possibly imagine what information they could be investigating that would negate her actions.
In fact, any information would likely prove to make her look worse.
If she does claim she knew him, or was in a relationship with him, then she lied about thinking it was her apartment.
Unless she's going to try and claim that she thought her ex had broken in and changed the locks?
I just don't see how any information that could be investigated would prevent her from being charged.
I don't like this.