[kinkora]

The police is a good place to start. :)

Also, since you know the IP, do a ns-lookup of the IP and identify which internet provider owns that IP and follow it up with them. They would be should be able to let you know which customer was using that IP address.

Note it is not as simple as it sounds cause due to privacy laws, you can't just call up a service provider and demand the identity of a user behind an ip address. Usually, only the police have the right to investigate this hence why you should start with them.

Sorry to hear about your bad luck. Hope this helps.