Planefag here. I'm not sure this signifies anything abnormal.
I saw 2 MD state troopers choppers near Frederick and Towson (not in DC) and one private chopper N315RD flying south currently over Columbia, MD. I.e. chopper situation appears normal. The two MD state troopers either went off radar before I could cap them or set down.
Unfortunately I'm not in the habit of watching civilian planes so don't have a feel for what's normal around a major city airport with civilian flights.
Good to keep watching and get lots of caps โฆ don't draw unwarranted inferences tho.
A happening on the ground won't necessarily have correlated air traffic.
Anybody got a DC police scanner?
R7