The until-now-buried, closed-door testimony came on Dec. 5, 2017 from Shawn Henry, a protege of former FBI Director Robert Mueller (from 2001 to 2012), for whom Henry served as head of the Bureau's cyber crime investigations unit.

Henry retired in 2012 and took a senior position at CrowdStrike, the cyber security firm hired by the DNC and the Clinton campaign to investigate the cyber intrusions that occurred before the 2016 presidential election.

The following excerpts from Henry's testimony speak for themselves. The dialogue is not a paragon of clarity; but if read carefully, even cyber neophytes can understand:

Ranking Member Mr. [Adam] Schiff: Do you know the date on which the Russians exfiltrated the data from the DNC? … when would that have been?

Mr. Henry: Counsel just reminded me that, as it relates to the DNC, we have indicators that data was exfiltrated from the DNC, but we have no indicators that it was exfiltrated (sic). … There are times when we can see data exfiltrated, and we can say conclusively. But in this case, it appears it was set up to be exfiltrated, but we just don't have the evidence that says it actually left.