1) The guy who stole the original Silk Road's funds and the proposed Silk Road 2's Funds
2) One of the owners of SK who stole their own users funds and make it seem as if a hacker took them
http://www.deepdotweb.com/2014/02/20/here-is-the-stolen-silk-road-wallet/
Could be someone relatively "close" to Klee, an owner of Silk Road 2(defcoin for example), or the hacker who stole from Silk Road
the 5K BTC may be unrelated to this hacker. He just donated some of my tag BTC and a small bit of the stolen BTC to that address, maybe to try to throw us off. It is only interesting that he donated my tag BTC there.
0.00112233 + 0.00011122 from me, 0.0006 from klee