I'm really sorry but I'm not sure I understand what has happened here?
Sorry but why are the police involved in this?
I will make an offer as you have asked but we could carry on online for no extra cost.
No, but did you report to them?
Ok. So if it is subject to a criminal investigation what were you hoping to do?
It would seem he is being investigated?
You can make a missing report although you will have to tell them the truth. That is that it is missing but you know who has it. Probably they won't cover it as it is not proven to be stolen at this stage.
You would sue the person in question but you will have to locate him.
Or it might be better to wait for the outcome of the police investigation as they will be identified then.
Can I clarify anything for you?
Do you know his address?
I suppose you could issue against him at the small claims court for the value or an injunction at the county court but I would wait for the outcome of the investigation. Otherwise you are just throwing good money after bad.
All the best.