As everyone knows I am a long time supporter, enthusiast and activist of Bitcoin.
As I have repeatedly stated (check my post history) I personally believe the single largest threat to the entire concept of Bitcoin would be the loss of the fungible nature of Bitcoin. Loss of the fungible nature of Bitcoin would demote it from a "money like" thing to a collectible thing. The difference is that a collectible must be appraised and graded by a "trusted third party" in order to determine its value (think diamonds for example). This would totally destroy Bitcoin and is the most likely path anyone who wanted to destroy it would take.
I am not one to just sit back and do nothing when it comes to my ideals and beliefs. Therefore believing that periodic mixing of coins is one sure fire way to ensure the long term viability of Bitcoin I periodically run my coins through a mixing service.
On the day in question I sent about 105 BTC through a mixer and got back about 100 that were totally unrelated to the 105 BTC I sent into the mixer.
As you have found out from your extensive research some or all of those 100 BTC came from the entity you were tracking. They simply put them into the mixer at about the same time as I put my into the mixer.
Good news: The BTC you are tracking are now in the possession of the Federal government here:
https://blockchain.info/address/1Eu38i1DkRAPAJhSqbseVroJDpMRfJbAx3Thanks for your quick answer.You have valuable informations which can identify Cryptsy hacker,so your help would be much appreciated.
You are right,some of Cryptsy hacker BTCs are really now in federal possesion,but let that put apart and concentrate on how these BTCs got to you.
You said that on that 27th.Aug.2014 you put about 105 BTC in mixer and got back 100 BTC unrelated to these ones you put in mixer.I carefully look at that 100 BTC input transaction I can say they were not in any mixer.I know how mixers are tumbling and splitting BTCs ,but this one was direct transaction to your wallet.
Cryptsy hacker moved his 28.7359 BTCs on 18.Aug.2014 from his wallet to wallet from which you directly got 100 BTCs.If he likes you put them in the same mixer,mixer would split his coins in many small pieces and tumble them many times with other coins before exit.But these BTC were no splitted or tumbled at all,just removed from one to the other wallet.
Hacker transation:
https://www.walletexplorer.com/txid/22947bd79b21b9afd85f15cb2941c994a070f99440bb45ac1002409ef19e5015Maybe you think on some others transactions on that day ? - because you have numerous input transactions in your stache(or cold) wallet on same days - 27th and 28th.August.2014 - wallet federal agents seized with 800 BTC in it(mark red) :
https://www.walletexplorer.com/wallet/1171b3f241b86bacOnly last one input transaction of 100 BTCs(which came from yours personal wallet and contains hacker 28.7359 BTC in it) was made on other date - 1st.Oct.2014 (mark purple),but even that one came in your personal wallet on 27th.Aug.2014
When I look at other input transactions to your big 800 BTC wallet,I see striking resemblance with the wallet from which you got 100 BTCs and with hackers 28.7359 in it:
Compare wallet where hacker 28.7359 were(first input transaction):
https://www.walletexplorer.com/wallet/00751a63ec1b72e0and others which filled your big wallet:
https://www.walletexplorer.com/wallet/03647a46a057c5b3
https://www.walletexplorer.com/wallet/04c6fc3ece11c8e5
https://www.walletexplorer.com/wallet/02d11321be0650b2
https://www.walletexplorer.com/wallet/04f68e5293356453
they were all formed at the same time(18-20.Aug.2014) like 100 BTC wallet and moved BTCs in close to 100 BTC batches to your big wallet
There were no mixers - if you look at one of these wallets :
https://www.walletexplorer.com/wallet/02d11321be0650b2you will see, it sent 2 transaction to your big wallet in 2 days - no mixers work like that:
So it is essential that you remember from who you bought these 28.7359 BTCs on 18th.August.2014. That was direct input in your wallet,no mixing.
Maybe some of other inputs to this your wallet ( https://www.walletexplorer.com/wallet/00751a63ec1b72e0 )passed through some sort of mixing(most of them are BTC-e output),but Iam 100% sure that this is not case with first input of 28.7359 BTCs