Just FYI this happened in 2020. When I saw it my reaction was "again?" but it turns out it's just about the sentencing in relation to the 2020 event.
> Complex reports that he made the call at his parents’ house and routed the calls from servers in Russia.
How did they manage to catch him, I wonder?
Lots of steganography techniques are mandated by the government agencies, such as microdots printed by inkjet and laser printers that can uniquely identify the printer, ADC and codec chips that can add modulation signatures to voice calls and video streams and so on.
In this case, he probably used TOR - which is notoriously infiltrated by government server nodes- and a SIP relay that might be hosted on Russian servers but might send hidden telemetry that the operator might not even know is going out.