Europe is catching up with America in terms of confiscated Bitcoins.
That's fine! I am sure that as a common bitcoin user, you would not want such criminals to be a part of the network. So with every criminal scot Bitcoin network is getting cleaned a bit. Definitely it is a good job done by the German police by catching the criminals and by confesticating the Bitcoins. Doesn't matter how decentralize the network is, criminals are not welcome.
So let Europe catch up with America in this matter because it is for the greater good of the Bitcoin network.
But unfortunately, the article does not contain information about how the criminals and their assets were found. Perhaps it was a deal.