DNC咋知道，自然死亡，俄干的，H干的，trump 干的，muller 干的？
DNC says Papadopoulos tipster and key figure in Russia case might be dead
Joseph Mifsud, the mysterious Maltese professor believed to have played a
key role in igniting the Russia probe, vanished from public eye after his
name began surfacing in news stories.
Now, lawyers for the Democratic National Committee say it is possible Mifsud
is dead. http://www.foxnews.com/politics/2018/09/10/dnc-says-papadopoulos-tipster-and-key-figure-in-russia-case-might-be-dead.html
