Don't we have extradition treaties with them?
5.56mm
Actually re France See Polanski, Roman - No extradition to USA
There was also some greenie professor who left his girlfriend in a trunk in the US and stayed in France for 20+ years.
Even if there is a treaty the fine print can keep one “safe”.
Mexico, for example, will not extradite anyone to the US if the “extraditee” faces the death penalty.
As far as Russia goes I think who ever can pay the most wins. ;-)