I've just started the game but honestly I find it silly to let yourself be blackmailed like that, you have clear evidence that someone is making it look like you have committed a crime, if you go to the police, you can expose this, even if this "evidence" comes out that only shows that she is moving the box, now if they have cameras there they should have cameras elsewhere, with an investigation you can easily prove that she had nothing to do with it, since I doubt very much that they have erased the recording of all the areas where she was after that incident because it would be easy to see who are the possible culprits since they do not appear on any camera.
Edit: Well now he has a cctv of her with ron, more idiot impossible it is obvious that if he got the recording once he can get it again, and that also means he has access to the recording room, she also lives in a nice house and has no security system? with that you can check who is the one who delivers the packages, the truth is I'm not even going to bother to digest the plot, I'd better just focus on her interaction with the other characters.