There is pretty strong evidence that this guy was involved in some theft of BTC. I'm trying to talk to him to make absolutely certain.
from that man from IRC only 9000 BTC, in that day when I received BTC rate was about 0.30/BTC, so it's total of ~3000 USD, so it's necessary to block all my money ( all 45 000 USD) ? ore suspicious transactions involved?
You bought coins for USD 3000, and don't remember anything about this guy (e.g. IRC channel or nick or LR account number) or have any record of the transaction? Doesn't sound very likely to me. Are there more suspicious transactions involved?