According to Reuters he was found guilty of "charges including distributing drugs through the Internet and conspiring to commit computer hacking and money laundering." In addition to running an illegal market bazaar for 4 years.
I'm stressing it out again, multiple people died from overdose because of him and multiple people were about to get executed because he hired hitman to kill them.
And you didn't bother to address that he ran a market for illegal goods and services, for some reason.
but they didn't, so we can forget about concept of justice.
"But he was a libertarian!" Shrugs