in 2013 the most people assumed their transactions were more or less anonymous. Obviously as well your scammer. So I see still certain chances to find the scammer (especially in case you both are in jurisdictions like Germany/Netherlands.
Someone here mentioned address 1NrrEnKJ5tsgBgSQcPjLKXXo6Q9EGrh4zM
My forensic tools tell me that the owner of this address is very likely as well the owner of 174 other addresses and that this person sent funds to his accounts at the following exchanges:
- BTC-e.com
- Bitstamp.net
- MtGox.com
- Bitpay.com
For MtGox and BTC-e it might be a bit too late but Bitstamp.net is still in business (based in Luxembourg and UK) and Bitpay.com as well (based in US).
So in case police closed this and you didn't get anything back the lost BTC amount at today rates (around $600k) would be worth giving it a new try.
If you want to direct message me I can give you more details, as well in case you need an analysis for other BTC addresses.
Good luck!