So... The guy is as dirty as the day is long. But there's ZERO CREDIBLE EVIDENCE - that $hillary's emails were hacked and not stolen from the inside; as William Binney and Ray McGovern have thoroughly established, using methods both HIGH and lowtech...
Witness tampering/intimidation - he's totally good for. The rest seems to be bogus - and based upon the Russophobic "Conspiracy Theories" of the Clinton campaign and DNC (who refused the FBI access to their servers - which would have provided irrefutable proof - of exactly how her emails from the campaign, wound-up in the possession of Wikileaks).
To me the whole story is about obfuscation of how $hillary LOST THE ELECTION (to what should have been the most beatable GOP candidate in 20 years), and a distraction from the damning evidence in those emails...
It turns out that Stone was assigned as a "Handler" to Trump back in the 1980's - by the arch-conservative, mob lawyer, and spooky attache' - Roy Cohn.
Like the Clintons and Bushes - Stone also has connections to the NXIVM cult.