It was this guy https://blockchain.info/address/19Gt9VKmmyMpMHEv6dkf8ddwmwddoSoJ8w
Some guy called nemesis is taking responsibility.
Nemesis bought 10k coins in 2012, but unless he has done some pretty hot trading since, he would not control an address with 35k
Using his words, he seems to enjoy "slaughtering pigs."
Cypher, do you know much about Nemesis?
no i don't. he sounds too small.
My one interaction with Nemesis was after the March 2013 fork.
There was one person then who claimed to have successfully pulled off a double spend on a merchant by putting one transaction on the 0.8 chain and another on the 0.7 chain (which later became the official chain). I asked for some clarification on how this was possible since even though there were two chains, in theory many nodes on both chains were connected to each other and sharing transactions.
Nemisis replied in crazy attack / insult mode and two replys on my side explaining the question more just got more insults from the guy.
I still remember him as the most offensive person on bitcointalk. That is saying a lot.