This thread is now full of paranoia, hehe.
1) Not sure that tracking of the site IP can help you to track its owner' IP anyhow, site IP will only show you where server is located, nothing more or less, so more likely its just waste of time.
2) We did most likely all we can do atm, we made that scammer's Google adsense account banned - I was one of those who wrote to Google adsense, guy was abusing their privacy policy and TOS hard, a) they don't accept faucets in case of high CPM and low click rate - adsense thinks its really dirty kind of traffic; b) he had 5 google ads per page, and max allowed by them is 3 ads. All this was explained in my abuse report to Google adsense.
At least he will not get ad revenue earned by his fraud activity.
About getting farther - not sure that google will share the site owner's personal info with any of us, they care about privacy of their users, no matter what those do.
What @Slow death suggested - it might work, https://www.ic3.gov/default.aspx - is the way, but remember that all transactions were in BTC, the currency which was made as anonymous, so when things come to proof that coins were sent to someone - you have trouble.