This is interesting but is there proof that these bitcoins have been seized? Is it related to Silk Road being shut down? I feel like I missed something. Also

This is interesting but is there proof that these bitcoins have been seized? Is it related to Silk Road being shut down? I feel like I missed something. Also it looks like there is a typo in the title, the linked site says that the transfer is for 27,365 bitcoins. Still a crazy amount.