The Democratic National Committee (DNC) and John Podesta would not allow government forensic testing of their computers.
So the US Intelligence community was forced to take the word of a third party: "CrowdStrike", an information technology company hired by the DNC.
CrowdStrike's report should be met with skepticism, but Democrats treated it as gospel.
Dmitri Alperovitch is the Co-Founder and Chief Technology Officer of CrowdStrike Inc.
He was born in Russia 1980, and moved to U.S. in 1995, with a deep hatred of Russia.
Dmitri had good reason to hate Russia.
Hacker Guccifer was using Russian servers to hide his tracks, according to the FBI report on its interview of Marcel Lazăr Lehel, (aka Guccifer), the Romanian hacker responsible for a number of high-level computer security breaches in the U.S.
The conclusion that Russian hackers broke into DNC computers and gave emails to a third party who gave them to WikiLeaks has no proof, and is based on the word of:
(1) A Russian CTO who left Russia with a deep hatred for Russia,
(2) A man who was on the DNR payroll, and
(3) A man who falsely claimed Guccifer was Russian, when he was Romanian.
Based only on a CrowdStrike report, Obama issued sanctions and kicked out Russian diplomats.