I’ve seen those black ones up in DC and the Cheverly area. My Dad used to live up there.
Getting them out of knot holes that you can reach is a challenge. I have “twisted” them out by cutting a small sapling with a fork on the end. Trim all the branches and cut the forked ends short and sharp. It helps if the forks are wide. Then run the forked end into the knothole until you can feel the critter inside. Then crank on the sapling making the points grab the critter. When the growling and hissing starts look out he is coming out! Had one run down my arm one time. I was yelling don’t shoot cause my partner was waiting to dispatch the wounded squirrel. A length of catbrier works too, just trim the thorns on your end do the same thing.