Found the news article-— WTOP and it was July 13, 2016, three days after Seth Rich murder.
The additional info on the participants in the shoot out is that one of them was Id’d by George Webb (the youtube poster who is a civilian reporter, with spook friends and in the fight— sometimes he’s waaay out there. He was not on this)— as a convicted Baltimore ganger contract hitter. The connex to Baltimore was important, as it brought it into the Rosenstein counterintel background, and as the FBI chief agent Baltimore when Mueller was FBI director and Comey not there yet. All the dirty cops.
Will have to find the Webb report on this event, now 4 years ago this July.
Here: https://wtop.com/dc/2016/07/u-s-capitol-visitor-center-on-lockdown/
Good work on digging up the WTOP piece.
IDK if george webb or WAPO coverage would still be available on this track.
Outstanding dig! Thank you and thanks, thinden, for the pings!!