According to Wikipedia[1], he was convicted of charges related to hacking, narcotics, money laundering, and more.
But during the trial, evidence was presented that he made murder-for-hire payments, the court found that he did by a preponderance of evidence, and the court took this into account when sentencing him.
So, he wasn't convicted of it, but it is part of the reason he was sent to jail for a very long time.
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