The D.C. Circuit on September 25 upheld the conviction and 150-month sentence of Roman Sterlingov, operator of the Bitcoin Fog mixing service. The ruling relied on expert testimony from blockchain analysis company Chainalysis regarding its Reactor software, without requiring the company to disclose the software's source code. Chainalysis highlighted this decision on October 13, viewing it as further validation of its Reactor software's use as courtroom evidence.