Doesn’t make a difference. The US and Russia signed a treaty of Mutual Legal Assistance in criminal matters on June 17, 1999.
He can still be extradited and prosecuted.
https://www.congress.gov/treaty-document/106th-congress/22/document-text#:~:text=Treaty%20between%20the%20Government%20of,a%20related%20exchange%20of%20notes.
wy69
I don’t think the US or Russia are being polite these days.