The relations between USA and Russia are not friendly at all. With all the sanctions going on and threats of new one diplomatic incident looks like something the US would actually welcome. Would give more reasons to put even more pressure on Russia.
As for inability to detect whatever Russia might have done to the guy - what on Earth does that have to do with the refusal of medical help?
As for inability to detect whatever Russia might have done to the guy - what on Earth does that have to do with the refusal of medical help?