is attack on titan (shingeki no kyojin) episode 41 filler?

Hitch Dreyse and Marlo Freudenberg search the forest near Stohess District for rogue members of the Scout Regiment. They find Armin Arlelt collecting water from a stream and tell him to turn around while they point their rifles at him.

But before they can take him into custody, Levi and Mikasa Ackermann ambush the two of them and take them captive. In Trost District, Roy and Peaure interview Commander Nile Dawk about the civilian who was supposedly murdered by the Scout Regiment.

Nile says that the evidence points to that conclusion, but they cannot be certain yet.