The author doesn't really seem to understand what a Bitcoin Wallet is. First, I HIGHLY doubt that 600,000 Bitcoins would be in one Wallet. More likely, the bit coins would be spread between several thousand wallets. Second, even if the FBI was in possession of "the wallet" couldn't Ulbricht just access his backups else where?
those are apparently user funds that were in escrow or otherwise stored with silk road at the time of the seizure. his personal commissions are the funds being discussed here
