chronology
1. I register account on mtgox.com
2. I deposited small amont of funds from liberty reserve to mtgox.com for testing.
3. I deposited big amount of funds from liberty reserve to mtgox.com for starting trading.
4. I buy some k$ BTC in mtgox.com market, I withdraw some k$ BTC to my bitcoin account, to see how it works.
5. I countinue trading on mtgox.com market.
6. I withdrawing some funds from mtgox.com back to liberty reserve.
7. I meet man in IRC who offer me to make deal, he send me ~9000$ BTC I send him ~3000$ liberty reserve (simple trade) minus some fees, I accepted, trade was made. btc rate in that day was ~0.30/BTC.
8. After month after trade was made (with man from IRC) I noticed that my mtgox.com acount is blocked.
9. Mtgox.com starting asking from where I get those 9000$ BTC, I explained.




At the end:

in my mtgox.com account is 45000 USD, ~2650 BTC.
in my bitcoin account is ~12 000 BTC