@Patrick2003 So sorry this happened to you, especially trying to get Air BNB to cooperate with a police investigation. Are you also trying to get paid for the additional days the guest stayed and that is the basis of your claim?
I also have a private room listing and I know you can be trusting of people staying in your home, but I always locked my room whenever I left the house. While I might not think a guest will steal, I think a guest might be curious if just left on their own, so the door is locked.
Of course you have reported the credit card and are not responsible for the charges, but still it is a pain to deal with this.