I'm so relieved that the Special Counsel investigators are finally looking in to these very suspicious actions of Roger Stone...!
We need to find out what went on between the two.
They aren't investigating Stone,
per se, but rather the theft and publication of emails and the nature and extent of the relationship between that act and the campaign strategy, plans, and activities of American candidates in the 2016 election. Stone is merely a "person of interest" in understanding that relationship. Investigators may or may not find that his role in that relationship was criminal. If his role was criminal and he had the requisite
mens rea, he will become a defendant. If his role was not criminal, at most, he will be a witness.