Except (1) Russia has the same missle-detecting satellites we do and would have raised a fuss. (2) Whoever owns the sattelite would raise a fuss. (3) If that was what happened, even if the US wanted to lie about it they could say “Yes, we were conducting a military training exercise in the area”.
And if it had been an old CCCP satellite with spent nuclear fuel? The Russkies response, after we shot it down, would be to send the finest bottles of vodka to our NORAD generals.