It's the government trying to enforce their opinion of who should own those Bitcoins, thereby taking power away from the owner that the network has decided on, which would be "whoever has the cryptographic keys".
And if you're released from prison and recover your Bitcoin, you will be arrested again for contempt of court or a similar charge.
> anonymity-enhanced virtual currency (AEC), in a practice known as “chain hopping”; and using U.S.-based business accounts to legitimize their banking activity.
Their problem was that they "closed" the money circle by sending it to real bank accounts. That's how they caught their trace. It seems that laundering billions of dollars is not as easy as they thought haha.