I started with my address dedicated for receiving MT withdrawals:1KvHt6zjQVihCYwWc1R4iq1XD5XHFf8DE The address which sent BTC to me must belong to MT: 1GTzSqZnriRDQhYCuCogJWBdsLohbiQDjm And it's BTCs are from: 1H8o8rMeKqTmzAYPzTJ9dsQS74gFhbo9Cb And the above address's BTCs are from: 15djbnRFum3JNUdtC2kziifUMbfKxHeVq7 This is a big BTC pool, handles thousands of BTCs. Then I traced down, found: 15djbnRFum3JNUdtC2kziifUMbfKxHeVq7 ->1KDaP3YfKPUZQ45dTYeRjaSCyVJYLQQpQQ  ->1Gi1jz9FahtMtCPTyUZnmp3Rwc97uVyoBj (this address's last action is 25th Feb, it currently holds 1000 BTCs)->1Drt3c8pSdrkyjuBiwVcSSixZwQtMZ3Tew And search back from 1Drt3c8pSdrkyjuBiwVcSSixZwQtMZ3Tew, I found 1EFFTDrZYZy6s7qP2gCfeEWbnb9ViqdaxG ,another big pool, who's last transaction is in 25th Feb, and now has 5000BTC. So, I found 6000 BTCs belong MT.Gox, and are still active !