A great article by Wired on how the FBI might deal (or not deal) with their seized bitcoins:
http://www.wired.com/wiredenterprise/2013/10/silk-road-bust/Very interesting problem for them: bitcoin has already been legally declared a form of currency, but they have no government-sanctioned method of dealing with bitcoin currency. I'm guessing it either gets sold at auction or they tear up the private key.
An FBI spokesperson quoted by Forbes explained that the amount of Bitcoins already seized was held from Silk Road user accounts, and that the agency has not yet been able to get to Ulbricht’s own encrypted Bitcoin wallet.
“That’s like another $80 million worth,” the spokesperson was quoted as saying.
The agency also appeared to be unsure what to do with the digital money trove once the Silk Road court case is closed.
“This is kind of new to us.
We will probably just liquidate them,” the FBI spokesperson said.
http://rt.com/usa/fbi-silk-road-protest-785/