Sorry to hear this OP, it tarnishes the reputation of us all.
If you’ve filed a police report you should have a crime number and there is an open investigation. You can try to ensure all parties preserve any evidence that may be required by writing to them now. That means video camera footage from the branch and server logs from OF for example.
If the cnut is a professional scammer this is the data that will tie him to this fraud, when he’s eventually caught (for this crime or another).
Good luck and don’t let this horrible turd ruin your holiday...