This is like Americas Most Wanted, sometimes the stories are terrible, the other times they are true, but nobody ever stands up.
Personally, IcyGamma is being an idiot thinking people will care about his duplicated house build, when in actuality people don't really care. Plus, even if you find the culprit, he could cover up his tracks and get a diff ID/Name and still host it. If you think your build is important and that people will hunt down the save leaker, then you need to get rid of your high ego.