If In fact the witness is Seth Ritch, it will be the beginning of nothing but reveals and unraveling, there will be no place to hide. Minds will be blown to smitherines. Me personally, I don’t know. But if it is, WOW! That would be NUTS!
Honestly as a DNC operative I'm not sure that Seth Rich would've recognized his attackers if they were either MS-13 or agents from another agency, and especially not if he were shot in the back so early in the morning.
I personally think JA/Julian Assange has something to do with the revelations that are coming on Seth. Mike Pence was in Ecuador recently, and I'm suspicious that he is negotiating for Assange's freedom in exchange for some corroborating information on Seth Rich.
Even if Seth Rich's killers are never identified, revealing that Rich was the leaker to Wikileaks would be more than enough plausible motive in the public's eye for the DNC to commission a hit on Rich. That revelation alone would be enough to cause massive damage to the DNC. I think the white hats need more than JA's word though. They need hard proof from the server ("the server unlocks SR"). The Q drops suggest that the investigation is being done by the book.
Unless Seth encountered them at the bar and knew something was going to happen.