The case of a mysterious 2012 bitcoin heist is closed.

He faces up to 20 years in prison.

Zhong began to cooperate with authorities this past March, when he voluntarily surrendered over a thousand additional bitcoin.

He is scheduled to be sentenced on Feb. 22.

Silk Road was a black market that functioned on the dark web from 2011 to 2013.

Its founder,Ross Ulbricht, was convictedin 2015 of seven charges related to the activity of Silk Road.

These included conspiracy to traffic narcotics, money laundering and conspiracy to commit computer hacking.

He wassentenced to life in prison.